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Fire for Watersheds

News Feed
Friday, April 26, 2024

Originally published by BioGraphic. Fire is not coming easily to the pile of dried grass and brush. Four college students fuss with the smoldering heap while Ron Goode, a bear-like man with a graying braid, leans on his cane and inspects their work. Crouch down low, he tells them. Reach farther into the brush with the lighter. Tentative orange flames spring to life and a student in a tie-dyed t-shirt blows gently, imploring them not to die. It’s a clear November day in the western foothills of California’s Sierra Nevada near the town of Mariposa. The students, visiting from the University of California, Berkeley, are here to help revitalize a patch of live oaks that belongs to Goode’s wife’s family. Goode, the chairman of the North Fork Mono Tribe, is here to teach them how. Now in his early 70s, Goode and his Tribe have worked for decades to restore neglected meadows and woodlands on private property,  reservations belonging to other Tribes, and on their own ancestral homelands in the Sierra National Forest. And restoration, in these dry hills, calls for fire. Dressed in cotton shirts and pants, the students feeding the thread of smoke in the oak grove look more like landscapers than a fire crew. “We’re not firefighters. We’re burners, professional burners,” Goode explains. “And we’re using Native knowledge, traditional ecological knowledge, from centuries ago.” This approach, employed by Native peoples across the world, is known as cultural burning. Once the fire is rolling, the students use pruning shears to cut more naked stems of Ta-ka-te, or sourberry (Rhus trilobata), down to the ground and toss those onto the now crackling pile. The next morning, after the flames have devoured this fuel, Goode’s grandnephew Jesse Valdez will coach the students on how to mix the cooling ash into the soil with rakes, to fertilize the roots below. After piles are burned and extinguished, fire practitioners will rake the ash into the soil to fertilize the roots below. Photograph by Ashley Braun Cultural burning is a kind of gardening. This Indigenous stewardship tradition of clearing, landscaping, and burning mimics natural disturbances, which create a diverse mosaic of habitats and trigger beneficial growth patterns in certain plants. Goode, Valdez, and other practitioners use small, targeted fires to help reshape and rejuvenate landscapes, both for the overall ecological health of the land and for specific cultural purposes, from cultivating traditional foods to sustaining ceremonial practices. Fire, for instance, stimulates Mo-nop’, or deergrass (Muhlenbergia rigens), to explode with flowers. Nium people, as the Mono call themselves, use these flexible flower stalks to weave watertight baskets coiled and patterned like rattlesnakes. And towering Wi-yap’, or black oak (Quercus kelloggii) yield bushels of healthy acorns — once a staple in many Native Californian diets. Low-intensity fires discourage competing conifers, smoke out pests, and clear fuels that threaten to carry flames into the oaks’ more vulnerable crowns. Fire also improves fruit production in berry patches — another key food source for people and animals. Acorns were once a staple among many California Natives, accounting for up to 50 percent of Indigenous diets in the state. Photograph by Ashley Braun Before foreign colonizers arrived and suppressed the practice, Native Californians often lit low-intensity fires to realize benefits like these. Frequent, low-intensity fire also inoculated the landscape against the kind of destructive megafires that regularly scorch the West Coast today. In fact, fire was so endemic in pre-colonial times that the total area burned in California each year was far greater than that burned by modern megafires. But instead of leaving a blackened moonscape largely devoid of life, the low-intensity fires revitalized the land. Now, Indigenous peoples across the United States are reclaiming traditional fire stewardship practices, from California and Oregon to Minnesota and Texas. They are reviving their connections to their cultures and homelands, restoring ecosystems, boosting biodiversity, and reducing wildfire risk. In California, they’re even using fire — counterintuitively — to bring water back to the parched land. “Let’s go way back in time,” Goode says, beginning a Nium story. “Tobahp — Land — married Pia — Water — and they had a mischievous child named Kos. And Kos is Fire. Kos liked to run around out in the forest and leave a trail, and wherever Kos went, his father Pia would follow him and sprinkle water on his trail, and his mother Tobahp would come along and plant flowers and plants.” The ancient allegory describes wildfire in the Sierra, Goode explains: After flames pass over the land, “Water is everywhere, and the first thing that starts popping up are all the cultural plants and the flowers.” Learning to harness fire and its benefits over millennia allowed Native Californians like the Nium to create and maintain open, park-like landscapes. They wanted clear sightlines to watch for danger and protect their villages and families. And the grassy oak savannas and meadows that they tended with cultural burning were ideal for gathering food, medicines, and other supplies, as well as for travel and hunting. Meadows are good for more than just people, says Joanna Clines, a Sierra National Forest botanist who has worked with the North Fork Mono on restoration. These wetland ecosystems are often-spring-fed and boast “a huge explosion of diversity,” Clines explains, including dozens of species of sedges, rushes, and grasses,  which in turn provide cover and forage for deer, birds, frogs, snakes, and other fauna. Wildflowers like common camas hide delicious bulbs beneath the damp soil and produce blooms that attract native butterflies and bees. Comprising just 2% of the region today — historically they may have covered more than four times that — meadows “are the gems of the Sierra Nevada,” Clines says. But from the late 18th to the early 20th century, colonists violently removed Indigenous stewards from their meadows, and from the land. Fires were snuffed out or never lit. Indigenous people in the Sierra and beyond were killed in droves, forced to assimilate, and corralled onto reservations. Spanish missionaries were first to ban cultural burning, followed later by the U.S. government. After a devastating complex of wildfires burned 3 million acres in the Northern Rockies in 1911, Congress passed a law establishing a national forest policy of fire prevention and suppression. The Bureau of Indian Affairs later adopted it on reservations. The land and people are still recovering from their forced separation from fire. Fifty miles east of Mariposa, Goode surveys a meadow within the North Fork Mono’s homelands, where fragrant native mint and soaproot toast in the autumn sun, alongside a muddy spring. The meadow is part of the 1.3-million-acre Sierra National Forest. For a long time, the Tribe tended deergrass and other resources here, Goode says, but in the early 1980s, many began to feel that the national forest no longer welcomed them in this place. Without the Tribe’s ministrations, ponderosa pines marched in, along with aggressive European invaders like Scotch broom, shading out what had been the largest deergrass bed in their homelands. In 2003, Dave Martin, a friendly new Forest Service district ranger, invited the North Fork Mono back to this meadow. When the Tribe returned, they found it unrecognizable. But with initial help from an environmental nonprofit and local volunteers, the Tribe chopped brush and selectively logged to mimic what fire would have accomplished had it been allowed. They also performed three cultural burns between 2005 and 2010. Some pines were too large for them to cut or burn, but the utility company PG&E serendipitously felled them later as it cleared space around its powerlines to avoid sparking wildfires. Freed from thirsty conifers, the meager spring began gushing through the summer. Within a few years, Goode says, these five verdant acres were once again worthy of the label “meadow.” A stately black oak — a favorite tree among many California Tribes — drops acorns at its margin, and Goode points out the sprawling hummocks of returned bunchgrasses, their green glow fading to straw. “These are all the fresh deergrasses,” he says. “They go way up, all the way to the farthest telephone pole now.” The link between fire and water is well-recognized among fire-dependent Indigenous cultures worldwide, says Frank Kanawha Lake, a Forest Service fire ecologist who collaborates with Goode on research. Historical records suggest that Tribes throughout California, for example, have long known that burning brush makes springs run better and helps save water, according to research by Lake, who has family ties to the Karuk and Yurok. Even in swampy Florida, the Seminole Tribe has a long history of burning in marshes and other damp ecosystems to encourage cultural and medicinal plants that require a higher water table. The Maar-speaking Indigenous peoples of southeastern Australia, meanwhile, tell a story about a vengeful cockatoo who sets a grass fire that prompts a musk duck to shake its wings, filling lakes and swamps with water. Western science is just starting to catch up with this kind of Indigenous knowledge. Tucked beyond the iconic monolith Half Dome in Yosemite National Park, north of Goode’s restored meadow, Illilouette Creek rushes past streaked granite and patches of charred pines. For almost a hundred years, federal land managers suppressed every blaze in the creek’s fire-adapted basin. Then, in 1968, the National Park Service acknowledged fire’s ecological role with a new policy of “Natural Fire Management.” The policy allowed lightning-caused wildfires to burn in zones where they didn’t threaten human health or infrastructure and where natural fuel breaks contained their reach. By 1972, Yosemite had applied the approach to granite-flanked Illilouette Creek Basin. In the following four and a half decades, wildfire remade the landscape, though not in the way of the megafires that often grab headlines today. Instead, the blazes were more frequent, smaller, and burned with varying degrees of severity — likely aided at first by the cooler, wetter climate of the 1970s and ’80s. Using aerial photography, ecohydrologist Gabrielle Boisramé and a handful of collaborators discovered that Illilouette Basin’s forest cover shrank by a quarter, more closely approximating historical conditions.  New holes appeared in the canopy, filling in with shrublands and meadow-like fields, which have more than tripled in area since 1972. In 2019, Boisramé published a model-based study that suggested these changes have made the basin modestly but notably wetter. “In the more open areas — which are maintained open by fire — you get deeper snow, and it sticks around longer,” in part because more of it reaches the ground, says Boisramé, who’s now based at the nonprofit Desert Research Institute in Nevada. “That means that water from the snowmelt is getting added to the soil later into the dry season, which is better for vegetation, and can help maintain some of those wet meadows” — as well as boost streamflows and groundwater in a region often grappling with drought. Her previous modeling also shows that fire’s return brings as much as a 30% spike in soil moisture during the summer. The extra water stored and the smaller number of trees competing for it seem to have helped Illilouette’s trees weather the state’s worst drought in centuries, even as trees in the adjacent Sierra National Forest died in droves, Boisramé says. And the type of fire diversity now found in Illilouette is connected to better long-term carbon storage and greater biodiversity, with documented benefits for bees, understory plants, bats, and birds. Teasing out fire’s precise and myriad influences on hydrology is challenging, given the many variables involved for any particular place or circumstance. However, Boisramé’s studies are part of a small but growing body of work that suggests frequent fire has long-term hydrologic benefits for ecosystems adapted to such blazes. In the mid-20th century, pioneering fire researcher Harold Biswell found that the prescribed burns he conducted on cattle ranches in the Sierra Nevada foothills helped revive summer-parched springs. That aligns with research in the western U.S. showing that some watersheds — particularly those without substantial groundwater stores to feed waterways — see more water in streams after fire, likely thanks to fewer thirsty plants. Researchers in Australia, meanwhile, recently published a paper suggesting that European colonization of southeast Tasmania created the region’s dry scrublands and devastating megafires by suppressing Indigenous burning that had maintained waterlogged heathlands. Fire has less direct benefits, too. Inspired by the knowledge of Indigenous burners in the Karuk Tribe, have shown that wildfire smoke can block enough solar radiation to cool rivers and streams by nearly 2.5 degrees Fahrenheit. In some cases, that could offer localized relief to cold-water species like salmon during the changing climate’s hottest summer days. As more scientists and conservationists recognize the ways Indigenous people shaped ecosystem biodiversity and resilience with fire, there’s an opportunity to return reciprocity to management, says Lake — and to reconnect people and place. “What is our human responsibility, and what are our human services for that ecosystem?” he asks. “How do we prescribe the right amount of fire today, fire as medicine? Traditional knowledge can guide us.” There is little question that the land needs help. Of the more than 8,200 meadows that the Forest Service has documented in the Sierra Nevada, the agency has listed 95% as unhealthy, or worse, no longer functioning as meadow ecosystems. The North Fork Mono have taken on the task of reviving some of these places in addition to the deergrass meadow that Goode showed me. Working alongside the Forest Service, they’ve begun restoring at least five others in the Sierra National Forest since 2003. In 2018, and again last year, Goode signed five-year agreements with the Forest Service that he hopes will allow the Tribe to restore many more. Those agreements explicitly acknowledge their authority to carry out Indigenous fire management. But their traditional management practices have been challenging to implement. Goode and his team have so far assessed nine meadows for restoration — and eventually, for cultural burning. They and the Forest Service are working to cut down encroaching conifers and shrubs, clear dead and fallen trees and other vegetation, create piles for burning, remove noxious weeds, clear gullies, and build structures to stabilize eroding soil. All paving the way for vibrant meadows that will hold onto water. As some elements of those projects move forward, Goode’s team has so far hit a roadblock when it comes to lighting the actual fires. According to Goode, under the agreements, “it’s us putting fire on the ground, and them participating if they wish.” But the Forest Service won’t allow someone to set a fire unless they have a “red card” obtained through rigorous firefighter training. “The forest is in dire need of restoration, and cultural burning is certainly going to be a key component going forward,” says Dean Gould, Sierra National Forest supervisor. But the agency wants to operate as safely as possible, he adds. Fire practitioners must work in forests laced with buildings and infrastructure, under unprecedented climatic conditions and huge fuel loads. For his part, Gould blames the delay mostly on a lack of capacity. Several recent historic wildfires within the national forest have kept its staff from building a more robust prescribed fire program, which would coordinate cultural burns. The COVID pandemic added other delays, as did a slew of onerous new nation-wide recommendations for prescribed fire that the Forest Service issued in 2022 after losing control of two such burns in New Mexico. Tribes hoping to implement cultural burning on federal lands commonly face challenges like the ones the Nork Fork Mono has come up against. “[B]oth state and federal agencies lack an adequate understanding of Tribes and cultural fire practitioners, their expertise and authority, land tenure, and the requirements of cultural burns,” write the authors of a report put together for the Karuk Tribe. That, in turn, has led to “confusion, delay, and red-tape,” as well as interference with tribal sovereignty. “Either we do cultural burning the way it’s supposed to be done, or we’re not going to do it,” says Goode, whose team has more than a hundred small piles of brush prepped and waiting in two Sierra National Forest meadows — ready for them to light and tend the fires before snow falls. Indigenous fire stewardship also includes cultural rituals such as burning sage, which is sacred to many Native communities of California and Mexico. Photograph by Ashley Braun Traditional practitioners often see requirements like red cards as inconsistent with cultural burning, explains Jonathan Long, a Forest Service ecologist who has worked with several Tribes on the issue. Part of the problem is that cultural burning adopts precautions in fundamentally different ways than typical agency burns do. Their intentions and practices, for example, make for safer burns as a general rule. Practitioners tend to ignite only small patches of lower-intensity fire; they welcome both youth and elders to teach and learn; they manicure away risky fuels; and they tend burns closely enough to reduce impacts on cultural resources like deergrass, as well as other plants and wildlife. It’s akin to a city installing bike lanes and traffic-slowing measures so parents can transport kids safely to school by bike, instead of strapping them in car seats inside bulky SUVs. Either way, kids arrive in one piece, but the approaches are vastly different. There’s also not yet an official playbook for cultural burning within the Forest Service to help guide agency staff, which holds the process back. But Gould says he is part of a regional effort to draft such a policy and that his staff are thinking about how to apply that in the Sierra National Forest. “I think people are trying to work through, how do we craft the system in ways that will distinguish cultural burning from the wildfire suppression and large prescribed fire events where the risks are different?” says Long. Still, Long sees more opportunities for traditional fire practices opening up, especially in California, where in recent years the state has rolled out new policies that ease barriers to cultural burning on state and private lands. And at the federal level, in late 2022 the U.S. Forest Service announced 11 major agreements to jointly manage lands with Tribes, including one that allows the Karuk Tribe to conduct cultural burns in partnership with the Six Rivers National Forest in California. The White House followed that announcement with the first-ever national guidance on Indigenous knowledge for federal agencies. The document explicitly recognized the North Fork Mono Tribe for collaborating on research examining cultural burning and climate resilience. In December, Goode’s grandnephew Valdez trained the Tule River Indian Tribe and Sequoia National Forest staff during a cultural burn at that forest. Sierra National Forest staff also attended, hoping to use the event’s success as a springboard in their own forest, according to Gould. But Goode, now facing serious health issues, is losing patience with the plodding government agency overseeing his Tribe’s homelands, and is even considering legal options for enforcing his Tribe’s right to burn. “You’re not doing it fast enough, not just for the Tribe’s benefit, but for the land,” he says. As the light retreats after the first day of burning near Mariposa, Goode and Valdez, both of whom also work as tribal archaeologists, gather the students next to a wide meadow. Goode’s wife’s property, where they’ve been working, lies within the ancestral territory of the Miwok people,  and a few years ago, Goode, Valdez, and a large volunteer contingent worked with some Miwok to clear and burn this portion of the land. These burns represent an intergenerational transfer of knowledge and culture, a core part of the practice and key to its continuity. While the sky turns citrus, the group stands atop a massive slab of granite bedrock that emerges from the sea of amber grass like the back of a gray whale. It’s pockmarked with deep, perfectly round holes, some filled with rotting leaves and recent rainwater. Here, the pair explains, the Miwok women who lived in this place at least as far back as 8,000 years ago milled acorns with stone pestles, their daily rhythms grinding permanent impressions into the stone. “They need to be cleaned and cleared out,” Goode says of the mortars. “Right now these are all deteriorating.” Like the meadow here that needed burning, even features as immutable-seeming as these bedrock mortars need tending. They need the Indigenous stewards whose hands shaped them; and people today to remember how to sustain the land. After the archaeology lesson, everyone piles back into trucks to return for dinner: foil-wrapped potatoes, roasting in the embers of today’s fire. Previously in The Revelator: Wildfires Ignite Mental Health Concerns The post Fire for Watersheds appeared first on The Revelator.

To bring more water to the landscape — and fight the growing risk of catastrophic wildfires — a Tribe in California helps to reshape fire management policy. The post Fire for Watersheds appeared first on The Revelator.

Originally published by BioGraphic.

Fire is not coming easily to the pile of dried grass and brush. Four college students fuss with the smoldering heap while Ron Goode, a bear-like man with a graying braid, leans on his cane and inspects their work. Crouch down low, he tells them. Reach farther into the brush with the lighter. Tentative orange flames spring to life and a student in a tie-dyed t-shirt blows gently, imploring them not to die.

It’s a clear November day in the western foothills of California’s Sierra Nevada near the town of Mariposa. The students, visiting from the University of California, Berkeley, are here to help revitalize a patch of live oaks that belongs to Goode’s wife’s family. Goode, the chairman of the North Fork Mono Tribe, is here to teach them how. Now in his early 70s, Goode and his Tribe have worked for decades to restore neglected meadows and woodlands on private property,  reservations belonging to other Tribes, and on their own ancestral homelands in the Sierra National Forest. And restoration, in these dry hills, calls for fire.

Dressed in cotton shirts and pants, the students feeding the thread of smoke in the oak grove look more like landscapers than a fire crew. “We’re not firefighters. We’re burners, professional burners,” Goode explains. “And we’re using Native knowledge, traditional ecological knowledge, from centuries ago.” This approach, employed by Native peoples across the world, is known as cultural burning.

Once the fire is rolling, the students use pruning shears to cut more naked stems of Ta-ka-te, or sourberry (Rhus trilobata), down to the ground and toss those onto the now crackling pile. The next morning, after the flames have devoured this fuel, Goode’s grandnephew Jesse Valdez will coach the students on how to mix the cooling ash into the soil with rakes, to fertilize the roots below.

After piles are burned and extinguished, fire practitioners will rake the ash into the soil to fertilize the roots below. Photograph by Ashley Braun

Cultural burning is a kind of gardening. This Indigenous stewardship tradition of clearing, landscaping, and burning mimics natural disturbances, which create a diverse mosaic of habitats and trigger beneficial growth patterns in certain plants. Goode, Valdez, and other practitioners use small, targeted fires to help reshape and rejuvenate landscapes, both for the overall ecological health of the land and for specific cultural purposes, from cultivating traditional foods to sustaining ceremonial practices. Fire, for instance, stimulates Mo-nop’, or deergrass (Muhlenbergia rigens), to explode with flowers. Nium people, as the Mono call themselves, use these flexible flower stalks to weave watertight baskets coiled and patterned like rattlesnakes. And towering Wi-yap’, or black oak (Quercus kelloggii) yield bushels of healthy acorns — once a staple in many Native Californian diets. Low-intensity fires discourage competing conifers, smoke out pests, and clear fuels that threaten to carry flames into the oaks’ more vulnerable crowns. Fire also improves fruit production in berry patches — another key food source for people and animals.

A closeup of an acorn cupped in a man's hand with a blurry background
Acorns were once a staple among many California Natives, accounting for up to 50 percent of Indigenous diets in the state. Photograph by Ashley Braun

Before foreign colonizers arrived and suppressed the practice, Native Californians often lit low-intensity fires to realize benefits like these. Frequent, low-intensity fire also inoculated the landscape against the kind of destructive megafires that regularly scorch the West Coast today. In fact, fire was so endemic in pre-colonial times that the total area burned in California each year was far greater than that burned by modern megafires. But instead of leaving a blackened moonscape largely devoid of life, the low-intensity fires revitalized the land.

Now, Indigenous peoples across the United States are reclaiming traditional fire stewardship practices, from California and Oregon to Minnesota and Texas. They are reviving their connections to their cultures and homelands, restoring ecosystems, boosting biodiversity, and reducing wildfire risk. In California, they’re even using fire — counterintuitively — to bring water back to the parched land.


“Let’s go way back in time,” Goode says, beginning a Nium story. “Tobahp — Land — married Pia — Water — and they had a mischievous child named Kos. And Kos is Fire. Kos liked to run around out in the forest and leave a trail, and wherever Kos went, his father Pia would follow him and sprinkle water on his trail, and his mother Tobahp would come along and plant flowers and plants.” The ancient allegory describes wildfire in the Sierra, Goode explains: After flames pass over the land, “Water is everywhere, and the first thing that starts popping up are all the cultural plants and the flowers.”

Learning to harness fire and its benefits over millennia allowed Native Californians like the Nium to create and maintain open, park-like landscapes. They wanted clear sightlines to watch for danger and protect their villages and families. And the grassy oak savannas and meadows that they tended with cultural burning were ideal for gathering food, medicines, and other supplies, as well as for travel and hunting.

Meadows are good for more than just people, says Joanna Clines, a Sierra National Forest botanist who has worked with the North Fork Mono on restoration. These wetland ecosystems are often-spring-fed and boast “a huge explosion of diversity,” Clines explains, including dozens of species of sedges, rushes, and grasses,  which in turn provide cover and forage for deer, birds, frogs, snakes, and other fauna. Wildflowers like common camas hide delicious bulbs beneath the damp soil and produce blooms that attract native butterflies and bees. Comprising just 2% of the region today — historically they may have covered more than four times that — meadows “are the gems of the Sierra Nevada,” Clines says.

But from the late 18th to the early 20th century, colonists violently removed Indigenous stewards from their meadows, and from the land. Fires were snuffed out or never lit. Indigenous people in the Sierra and beyond were killed in droves, forced to assimilate, and corralled onto reservations. Spanish missionaries were first to ban cultural burning, followed later by the U.S. government. After a devastating complex of wildfires burned 3 million acres in the Northern Rockies in 1911, Congress passed a law establishing a national forest policy of fire prevention and suppression. The Bureau of Indian Affairs later adopted it on reservations.

The land and people are still recovering from their forced separation from fire.

Fifty miles east of Mariposa, Goode surveys a meadow within the North Fork Mono’s homelands, where fragrant native mint and soaproot toast in the autumn sun, alongside a muddy spring. The meadow is part of the 1.3-million-acre Sierra National Forest. For a long time, the Tribe tended deergrass and other resources here, Goode says, but in the early 1980s, many began to feel that the national forest no longer welcomed them in this place. Without the Tribe’s ministrations, ponderosa pines marched in, along with aggressive European invaders like Scotch broom, shading out what had been the largest deergrass bed in their homelands.

In 2003, Dave Martin, a friendly new Forest Service district ranger, invited the North Fork Mono back to this meadow. When the Tribe returned, they found it unrecognizable. But with initial help from an environmental nonprofit and local volunteers, the Tribe chopped brush and selectively logged to mimic what fire would have accomplished had it been allowed. They also performed three cultural burns between 2005 and 2010. Some pines were too large for them to cut or burn, but the utility company PG&E serendipitously felled them later as it cleared space around its powerlines to avoid sparking wildfires.

Freed from thirsty conifers, the meager spring began gushing through the summer. Within a few years, Goode says, these five verdant acres were once again worthy of the label “meadow.” A stately black oak — a favorite tree among many California Tribes — drops acorns at its margin, and Goode points out the sprawling hummocks of returned bunchgrasses, their green glow fading to straw. “These are all the fresh deergrasses,” he says. “They go way up, all the way to the farthest telephone pole now.”

The link between fire and water is well-recognized among fire-dependent Indigenous cultures worldwide, says Frank Kanawha Lake, a Forest Service fire ecologist who collaborates with Goode on research. Historical records suggest that Tribes throughout California, for example, have long known that burning brush makes springs run better and helps save water, according to research by Lake, who has family ties to the Karuk and Yurok. Even in swampy Florida, the Seminole Tribe has a long history of burning in marshes and other damp ecosystems to encourage cultural and medicinal plants that require a higher water table. The Maar-speaking Indigenous peoples of southeastern Australia, meanwhile, tell a story about a vengeful cockatoo who sets a grass fire that prompts a musk duck to shake its wings, filling lakes and swamps with water.

Western science is just starting to catch up with this kind of Indigenous knowledge. Tucked beyond the iconic monolith Half Dome in Yosemite National Park, north of Goode’s restored meadow, Illilouette Creek rushes past streaked granite and patches of charred pines. For almost a hundred years, federal land managers suppressed every blaze in the creek’s fire-adapted basin. Then, in 1968, the National Park Service acknowledged fire’s ecological role with a new policy of “Natural Fire Management.” The policy allowed lightning-caused wildfires to burn in zones where they didn’t threaten human health or infrastructure and where natural fuel breaks contained their reach. By 1972, Yosemite had applied the approach to granite-flanked Illilouette Creek Basin.


In the following four and a half decades, wildfire remade the landscape, though not in the way of the megafires that often grab headlines today. Instead, the blazes were more frequent, smaller, and burned with varying degrees of severity — likely aided at first by the cooler, wetter climate of the 1970s and ’80s. Using aerial photography, ecohydrologist Gabrielle Boisramé and a handful of collaborators discovered that Illilouette Basin’s forest cover shrank by a quarter, more closely approximating historical conditions.  New holes appeared in the canopy, filling in with shrublands and meadow-like fields, which have more than tripled in area since 1972. In 2019, Boisramé published a model-based study that suggested these changes have made the basin modestly but notably wetter.

“In the more open areas — which are maintained open by fire — you get deeper snow, and it sticks around longer,” in part because more of it reaches the ground, says Boisramé, who’s now based at the nonprofit Desert Research Institute in Nevada. “That means that water from the snowmelt is getting added to the soil later into the dry season, which is better for vegetation, and can help maintain some of those wet meadows” — as well as boost streamflows and groundwater in a region often grappling with drought. Her previous modeling also shows that fire’s return brings as much as a 30% spike in soil moisture during the summer.

The extra water stored and the smaller number of trees competing for it seem to have helped Illilouette’s trees weather the state’s worst drought in centuries, even as trees in the adjacent Sierra National Forest died in droves, Boisramé says. And the type of fire diversity now found in Illilouette is connected to better long-term carbon storage and greater biodiversity, with documented benefits for bees, understory plants, bats, and birds.

Teasing out fire’s precise and myriad influences on hydrology is challenging, given the many variables involved for any particular place or circumstance. However, Boisramé’s studies are part of a small but growing body of work that suggests frequent fire has long-term hydrologic benefits for ecosystems adapted to such blazes. In the mid-20th century, pioneering fire researcher Harold Biswell found that the prescribed burns he conducted on cattle ranches in the Sierra Nevada foothills helped revive summer-parched springs. That aligns with research in the western U.S. showing that some watersheds — particularly those without substantial groundwater stores to feed waterways — see more water in streams after fire, likely thanks to fewer thirsty plants. Researchers in Australia, meanwhile, recently published a paper suggesting that European colonization of southeast Tasmania created the region’s dry scrublands and devastating megafires by suppressing Indigenous burning that had maintained waterlogged heathlands.

Fire has less direct benefits, too. Inspired by the knowledge of Indigenous burners in the Karuk Tribe, have shown that wildfire smoke can block enough solar radiation to cool rivers and streams by nearly 2.5 degrees Fahrenheit. In some cases, that could offer localized relief to cold-water species like salmon during the changing climate’s hottest summer days.

As more scientists and conservationists recognize the ways Indigenous people shaped ecosystem biodiversity and resilience with fire, there’s an opportunity to return reciprocity to management, says Lake — and to reconnect people and place. “What is our human responsibility, and what are our human services for that ecosystem?” he asks. “How do we prescribe the right amount of fire today, fire as medicine? Traditional knowledge can guide us.”


There is little question that the land needs help. Of the more than 8,200 meadows that the Forest Service has documented in the Sierra Nevada, the agency has listed 95% as unhealthy, or worse, no longer functioning as meadow ecosystems. The North Fork Mono have taken on the task of reviving some of these places in addition to the deergrass meadow that Goode showed me. Working alongside the Forest Service, they’ve begun restoring at least five others in the Sierra National Forest since 2003. In 2018, and again last year, Goode signed five-year agreements with the Forest Service that he hopes will allow the Tribe to restore many more. Those agreements explicitly acknowledge their authority to carry out Indigenous fire management. But their traditional management practices have been challenging to implement.

Goode and his team have so far assessed nine meadows for restoration — and eventually, for cultural burning. They and the Forest Service are working to cut down encroaching conifers and shrubs, clear dead and fallen trees and other vegetation, create piles for burning, remove noxious weeds, clear gullies, and build structures to stabilize eroding soil. All paving the way for vibrant meadows that will hold onto water.

As some elements of those projects move forward, Goode’s team has so far hit a roadblock when it comes to lighting the actual fires. According to Goode, under the agreements, “it’s us putting fire on the ground, and them participating if they wish.” But the Forest Service won’t allow someone to set a fire unless they have a “red card” obtained through rigorous firefighter training.

“The forest is in dire need of restoration, and cultural burning is certainly going to be a key component going forward,” says Dean Gould, Sierra National Forest supervisor. But the agency wants to operate as safely as possible, he adds. Fire practitioners must work in forests laced with buildings and infrastructure, under unprecedented climatic conditions and huge fuel loads. For his part, Gould blames the delay mostly on a lack of capacity. Several recent historic wildfires within the national forest have kept its staff from building a more robust prescribed fire program, which would coordinate cultural burns. The COVID pandemic added other delays, as did a slew of onerous new nation-wide recommendations for prescribed fire that the Forest Service issued in 2022 after losing control of two such burns in New Mexico.

Tribes hoping to implement cultural burning on federal lands commonly face challenges like the ones the Nork Fork Mono has come up against. “[B]oth state and federal agencies lack an adequate understanding of Tribes and cultural fire practitioners, their expertise and authority, land tenure, and the requirements of cultural burns,” write the authors of a report put together for the Karuk Tribe. That, in turn, has led to “confusion, delay, and red-tape,” as well as interference with tribal sovereignty.

“Either we do cultural burning the way it’s supposed to be done, or we’re not going to do it,” says Goode, whose team has more than a hundred small piles of brush prepped and waiting in two Sierra National Forest meadows — ready for them to light and tend the fires before snow falls.

A man in a wrestling tshirt holds burning sage while two other people can be seen in the background
Indigenous fire stewardship also includes cultural rituals such as burning sage, which is sacred to many Native communities of California and Mexico. Photograph by Ashley Braun

Traditional practitioners often see requirements like red cards as inconsistent with cultural burning, explains Jonathan Long, a Forest Service ecologist who has worked with several Tribes on the issue. Part of the problem is that cultural burning adopts precautions in fundamentally different ways than typical agency burns do. Their intentions and practices, for example, make for safer burns as a general rule. Practitioners tend to ignite only small patches of lower-intensity fire; they welcome both youth and elders to teach and learn; they manicure away risky fuels; and they tend burns closely enough to reduce impacts on cultural resources like deergrass, as well as other plants and wildlife. It’s akin to a city installing bike lanes and traffic-slowing measures so parents can transport kids safely to school by bike, instead of strapping them in car seats inside bulky SUVs. Either way, kids arrive in one piece, but the approaches are vastly different.

There’s also not yet an official playbook for cultural burning within the Forest Service to help guide agency staff, which holds the process back. But Gould says he is part of a regional effort to draft such a policy and that his staff are thinking about how to apply that in the Sierra National Forest.

“I think people are trying to work through, how do we craft the system in ways that will distinguish cultural burning from the wildfire suppression and large prescribed fire events where the risks are different?” says Long.

Still, Long sees more opportunities for traditional fire practices opening up, especially in California, where in recent years the state has rolled out new policies that ease barriers to cultural burning on state and private lands. And at the federal level, in late 2022 the U.S. Forest Service announced 11 major agreements to jointly manage lands with Tribes, including one that allows the Karuk Tribe to conduct cultural burns in partnership with the Six Rivers National Forest in California. The White House followed that announcement with the first-ever national guidance on Indigenous knowledge for federal agencies. The document explicitly recognized the North Fork Mono Tribe for collaborating on research examining cultural burning and climate resilience.

In December, Goode’s grandnephew Valdez trained the Tule River Indian Tribe and Sequoia National Forest staff during a cultural burn at that forest. Sierra National Forest staff also attended, hoping to use the event’s success as a springboard in their own forest, according to Gould. But Goode, now facing serious health issues, is losing patience with the plodding government agency overseeing his Tribe’s homelands, and is even considering legal options for enforcing his Tribe’s right to burn. “You’re not doing it fast enough, not just for the Tribe’s benefit, but for the land,” he says.

As the light retreats after the first day of burning near Mariposa, Goode and Valdez, both of whom also work as tribal archaeologists, gather the students next to a wide meadow. Goode’s wife’s property, where they’ve been working, lies within the ancestral territory of the Miwok people,  and a few years ago, Goode, Valdez, and a large volunteer contingent worked with some Miwok to clear and burn this portion of the land. These burns represent an intergenerational transfer of knowledge and culture, a core part of the practice and key to its continuity.

While the sky turns citrus, the group stands atop a massive slab of granite bedrock that emerges from the sea of amber grass like the back of a gray whale. It’s pockmarked with deep, perfectly round holes, some filled with rotting leaves and recent rainwater. Here, the pair explains, the Miwok women who lived in this place at least as far back as 8,000 years ago milled acorns with stone pestles, their daily rhythms grinding permanent impressions into the stone. “They need to be cleaned and cleared out,” Goode says of the mortars. “Right now these are all deteriorating.”

Like the meadow here that needed burning, even features as immutable-seeming as these bedrock mortars need tending. They need the Indigenous stewards whose hands shaped them; and people today to remember how to sustain the land. After the archaeology lesson, everyone piles back into trucks to return for dinner: foil-wrapped potatoes, roasting in the embers of today’s fire.

Previously in The Revelator:

Wildfires Ignite Mental Health Concerns

The post Fire for Watersheds appeared first on The Revelator.

Read the full story here.
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Tens of Thousands Protest Dundee's Ecuador Mine Project Near Key Water Reserve

QUITO (Reuters) -Tens of thousands of residents and local leaders in Ecuador's central Azuay province took to the streets on Tuesday to demand the...

QUITO (Reuters) -Tens of thousands of residents and local leaders in Ecuador's central Azuay province took to the streets on Tuesday to demand the suspension of a mining project by Canada's Dundee Precious Metals, which they say will affect a vital water reserve.The government of President Daniel Noboa had granted Dundee an environmental license to start building the Loma Larga gold mine there, but as community pressure mounted, the country's energy minister in August suspended the start of construction work until Dundee provides an environmental management plan. Provincial authorities reject the project, saying it will affect the region's 3,200-hectare Quimsacocha reserve and its surrounding paramos - highland moors that act as giant sponges and supply the bulk of drinking water to major cities there.Authorities estimated that over 90,000 people marched in the provincial capital of Cuenca on Tuesday, chanting "Hands off Quimsacocha!" and "Water is worth more than anything!""We want the national government to revoke the environmental license," Cuenca Mayor Cristian Zamora said. "The streets of Cuenca are roaring ... and they will have to listen to us."Dundee declined to comment on the protesters' demands.Despite Ecuador's significant gold and copper reserves, just two mines are operating in the country - projects owned by Canada's Lundin Gold and EcuaCorriente, which is held by a Chinese mining consortium.Noboa, meanwhile, stepped back from the project, saying responsibility for what happens next lies with the local authorities."The municipality and prefecture must take responsibility," he said in a radio interview on Friday, saying if Dundee takes them to an arbitration court that would have to go. "There is a very high probability (the project will not go ahead), but there is also a probability that there will be problems in the future."Strong community opposition, environmental concerns and legal uncertainty in Ecuador have contributed to a relative lack of mining projects. In Azuay, residents have rejected mining projects at the ballot box and courts have ruled in their favor to block mining projects in the area.(Reporting by Alexandra Valencia; Writing by Sarah Morland; Editing by Richard Chang)Copyright 2025 Thomson Reuters.

Santa Monica's waves have turned a bright pink. How can the dye job improve water quality?

Monday's pink, fluorescent dye drop in Santa Monica Bay is part of a project to study how water circulation could be driving poor water quality.

Over the next two weeks, surfers and beachgoers in Santa Monica may spot waves that have a pink, fluorescent hue — but officials say not to worry.The luminous, pink color spreading across the Santa Monica Bay is from a temporary, nontoxic dye that researchers are using to study how ocean circulation might contribute to the bay’s poor water quality. The project kicked off Monday morning, as UCLA and Heal the Bay researchers discharged the first of four batches of the pink dye near the Santa Monica Pier. “By following where the dye goes, we will better understand how the breakwater changes the environment around it, providing insight into Santa Monica beach’s poor water quality,” Isabella Arzeno-Soltero, an assistant professor of civil and environmental engineering at UCLA and a researcher on the project, said in a statement. Although the pink dye on Monday didn’t appear to create many “bright pink waves,” as researchers warned might be the case, additional bouts of the dye — or the fluorescent rhodamine water tracer dye — will be released later this month. But the fact that the dye seemed to dissipate quickly Monday didn’t mean the first phase won’t lead to important data, said Gabriela Carr, a researcher in the project and doctoral student at UCLA’s Samueli School of Engineering. “It was a big success today,” Carr said. “The dye is pink but it’s also fluorescent, so that’s kind of our main tracker.” A boat with “finely tuned fluorescent monitors” would remain in the bay for 24 hours, Carr said, and at least 10 additional trackers will remain attached to buoys through the end of the month, when additional dye drops will occur. The study is intended to help researchers understand how the man-made breakwater that was built in the 1930s in Santa Monica Bay, often visible during low tide, might hurt water circulation and, therefore, water quality. Santa Monica Pier routinely tops the yearly list of the state’s dirtiest beaches by environmental nonprofit Heal the Bay, which tests waters up and down the California coast for fecal bacteria, which can harm beachgoers. The break in the Santa Monica Bay was constructed to create a marina, but storms and time damaged it beyond effectiveness, though remnants of the rocky break still affect the water flow, researchers said.“It still substantially impacts the coastal hydrodynamics and surrounding environment,” Timu Gallien, an associate professor of civil and environmental engineering at UCLA and a lead researcher in the study, said in a statement. “For example, the breakwater protects the beach from large waves, keeping the beach wider than it would naturally be.”Santa Monica Mayor Lana Negrete watched the first deployment Monday morning and said she was hopeful this research could help her city finally get off the list of “beach bummers.” The city has partnered with the UCLA Samueli School of Engineering and the Bay Foundation on the project. “We’re trying to see if the circulation of the water is so poor that that’s creating the concentrated pollution 100 yards north and south of the pier,” Negrete said. “We don’t want to keep ending up on the beach bummer list — it’s a bummer!”She said this is one of many projects to help researchers understand and combat water quality issues, including a relatively new advanced water treatment facility and a sand dune restoration project. “This is all working in tandem,” Negrete said. “The whole ecosystem is important.”The researchers did not include in their announcement what remedies might be recommended if the breakwaters are determined to be responsible for, or a factor in, the poor water quality. That would probably be a multifaceted decision involving city and environmental leaders. Although this is the first time the dye has been used in the Santa Monica Bay, UCLA researchers said the coloring has been used for many years in other waterways, explaining that it disperses naturally and poses no risk to people, animals or vegetation.Carr said there may be more pink visible next week when the team performs another surface-level drop of the dye, but probably not as much when they do two deep-water drops later this month. Still, the pinkifying of the bay might not be much of a spectacle despite signs that were plastered all around the Santa Monica Pier area that scream: “Why is the water pink?” Carr said the team wanted to be sure the public did not become alarmed if the pink color was spotted. The next surface-level dye deployment will occur sometime Sept. 22–24, and the last underwater deployment will be Sept. 30, Carr said.

Exclusive-In Australia, a Data Centre Boom Is Built on Vague Water Plans

By Byron KayeSYDNEY (Reuters) -Authorities in Sydney approved construction of data centres without requiring measurable plans to cut water use,...

SYDNEY (Reuters) -Authorities in Sydney approved construction of data centres without requiring measurable plans to cut water use, raising concerns the sector's rapid growth will leave residents competing for the resource.The New South Wales state government, which presides over Australia's biggest city, green-lit all 10 data centre applications it has ruled on since expanding its planning powers in 2021, from owners like Microsoft, Amazon and Blackstone's AirTrunk, documents reviewed by Reuters show.The centres would bring in a total A$6.6 billion ($4.35 billion) of construction spending, but would ultimately use up to 9.6 gigalitres a year of clean water, or nearly 2% of Sydney's maximum supply, the documents show.Fewer than half the approved applications gave projections of how much water they would save using alternative sources. State planning law says data centre developers must "demonstrate how the development minimises ... consumption of energy, water ... and material resources" but does not require projections on water usage or savings. Developers need to disclose what alternative water supplies they will use but not how much.The findings show authorities are approving projects with major expected impact on public water demand based on developers' general and non-measurable assurances as they seek a slice of the $200 billion global data centre boom.The state planning department confirmed the 10 approved data centres collectively projected annual water consumption of 9.6 gigalitres but noted five of those outlined how they expect to cut demand over time. The department did not identify the projects or comment on whether their water reduction plans were measurable."In all cases, Sydney Water provided advice to the Department that it was capable of supplying the data centre with the required water," a department spokesperson told Reuters in an email.Data centres could account for up to a quarter of Sydney's available water by 2035, or 135 gigalitres, according to Sydney Water projections shared with Reuters. Those projections assume centres achieve goals of using less water to cool the servers, but did not specify what those targets were.Sydney's drinking water is limited to one dam and a desalination plant, making supply increasingly tight as the population and temperatures rise. In 2019, its 5.3 million residents were banned from watering gardens or washing cars with a hose as drought and bushfires ravaged the country."There is already a shortfall between supply and demand," said Ian Wright, a former scientist for Sydney Water who is now an associate professor of environmental science at Western Sydney University.    As more data centres are built, "their growing thirst in drought times will be very problematic," he added.The number of data centres, which store computing infrastructure, is growing exponentially as the world increasingly uses AI and cloud computing. But their vast water needs for cooling have prompted the U.S., Europe and others to introduce new rules on water usage.New South Wales enforces no water usage rules for data centres other than the government being "satisfied that the development contains measures designed to minimise the consumption of potable water," according to the documents.Just three of the 10 approved data centre applications gave a projection of how much the developer hoped to cut reliance on public water using alternative sources like rainwater. The biggest centre cleared for construction, a 320-megawatt AirTrunk facility, was approved after saying it would harvest enough rainwater to cut its potable water consumption by 0.4%, the documents show.An AirTrunk spokesperson said early planning documents referred to peak demand but "subsequent modelling recently tabled to Sydney Water has determined actual usage will be significantly lower".The company was "working with Sydney Water to transition the site to be nearly entirely serviced by recycled water", the spokesperson added.The most ambitious commitment to cut reliance on town water was 15%, for one of two data centres approved on land held by Amazon, planning documents show.The two centres would collectively need 195.2 megawatts of electricity and take up to 92 megalitres a year of Sydney's drinking water before rainwater harvesting, say the documents, which give a projected reduction in water use for one project but not the other.Amazon declined to comment on individual properties but said its Australian data centres avoid using water for cooling for 95.5% of the year because their temperature controls rely more on fans than evaporative cooling.Microsoft gave a 12% projected water use reduction for one of the two Sydney data centres it has had approved. Microsoft declined to comment.Sydney's suburban councils, meanwhile, want to slow what they see as competition for limited water supply, especially when the state wants 377,000 new homes by 2029 to ease a housing shortage.    "A lot of them have been built without much discussion," said Damien Atkins, a member of Blacktown council where state-approved centres owned by AirTrunk, Amazon and Microsoft are being built.    "There should be more pushback and I'm just starting to ask those questions now."    In the city's north, Lane Cove council asked the state to return approval powers to local government, citing water usage and other concerns.    Neighbouring Ryde council has five centres and another six in various stages of planning. It said those 11 would take nearly 3% of its water supply and has called for a moratorium on approvals.    On a small vegetable farm near where Amazon, Microsoft, AirTrunk and others are building centres, Meg Sun said her family's business had to turn off the sprinklers in the 2019 drought but still bought enough water from Sydney Water to drip-feed the crops.She worries what might happen if water demand is worsened by data centres' needs in the next drought."We can't even run the business then, because we do rely on water," she said.($1 = 1.5161 Australian dollars)(Reporting by Byron Kaye, with additional reporting by Stella Qiu; Editing by Sam Holmes)Copyright 2025 Thomson Reuters.

Toxic Pfas above proposed safety limits in almost all English waters tested

Exclusive: 110 of 117 bodies of water tested by Environment Agency would fail standards, with levels in fish 322 times the planned limitNearly all rivers, lakes and ponds in England tested for a range of Pfas, known as “forever chemicals”, exceed proposed new safety limits and 85% contain levels at least five times higher, analysis of official data reveals.Out of 117 water bodies tested by the Environment Agency for multiple types of Pfas, 110 would fail the safety standard, according to analysis by Wildlife and Countryside Link and the Rivers Trust. Continue reading...

Nearly all rivers, lakes and ponds in England tested for a range of Pfas, known as “forever chemicals”, exceed proposed new safety limits and 85% contain levels at least five times higher, analysis of official data reveals.Out of 117 water bodies tested by the Environment Agency for multiple types of Pfas, 110 would fail the safety standard, according to analysis by Wildlife and Countryside Link and the Rivers Trust.They also found levels of Pfos – a banned carcinogenic Pfas – in fish were on average 322 times higher than planned limits for wildlife. If just one portion of such freshwater fish was eaten each month this would exceed the safe threshold of Pfos for people to consume over a year, according to the NGOs.Pfas, or per- and polyfluoroalkyl substances, are a group of thousands of human-made chemicals used in industrial processes and products such as non-stick pans, clothing and firefighting foams. They do not break down in the environment and some are linked to diseases, including cancers and hormone disruption.Pfas pollution is widespread, prompting the EU to propose a new water quality standard that limits the combined toxicity of 24 Pfas to 4.4 nanograms per litre of water, calculated as PFOA-equivalents – a method that weights each substance according to its toxicity relative to PFOA, a particularly hazardous and well-studied carcinogen that is now banned.The EU is also planning to regulate about 10,000 Pfas as one class as there are too many to assess on a case-by-case basis and because none break down in the environment, but the UK has no plans to follow suit.Last week, environment groups, led by the Marine Conservation Society, wrote to ministers, urging a ban on all Pfas in consumer products and a timeline for phasing them out in all other uses. Now, public health and nature groups have joined forces to propose urgent measures to rein in pollution.“Scientists continue to identify Pfas as one of the biggest threats of our time, yet the UK is falling behind other countries in restricting them,” said Hannah Evans of the environmental charity Fidra. “Every day of inaction locks in decades of pollution and environmental harm … we’re asking the UK government to turn off the tap of these persistent forever chemicals.”They say the UK should align with the EU’s group-based Pfas restrictions and ban the substances in food packaging, clothing, cosmetics, toys and firefighting foams, following examples from Denmark, France and the EU. They want better monitoring, tougher water and soil standards and to make polluters cover the cost of Pfas clean-up.Emma Adler, the director of impact at Wildlife and Countryside Link, said: “Pfas are linked to an explosion of impacts for wildlife and public health, from cancers to immune issues. These new figures underline just how widespread Pfas pollution is and that Pfas regulation must be a much clearer priority in government missions to clean up UK rivers and improve the nation’s health.”Thalie Martini, the chief executive officer at Breast Cancer UK, said: “Evidence points to the potential for some Pfas to be related to health issues, including increasing breast cancer risk … millions of families affected by this disease will want the government to do everything they can to deliver tougher Pfas rules to protect our health.”Last year, 59 Pfas experts urged the government to follow the science and regulate all Pfas as a single class, warning their extreme persistence – regardless of toxicity – posed a serious environmental threat.skip past newsletter promotionThe planet's most important stories. Get all the week's environment news - the good, the bad and the essentialPrivacy Notice: Newsletters may contain info about charities, online ads, and content funded by outside parties. For more information see our Privacy Policy. We use Google reCaptcha to protect our website and the Google Privacy Policy and Terms of Service apply.after newsletter promotion“Countries like France and Denmark, the EU as a whole and many US states have taken strong action against Pfas pollution,” said Dr Francesca Ginley from the Marine Conservation Society. “The time is now for the UK to take a stand and show the leadership we need on Pfas pollution from source to sea.”Dr Shubhi Sharma of the charity Chem Trust said: “Too often with hazardous chemicals the world has ignored early warnings of harm and learned lessons far too late. Costs to tackle Pfas in the environment and address health impacts have a multi-billion pound economic price tag … the government must not delay.”An Environment Agency spokesperson said the science on Pfas was moving quickly and that it was running a multi-year programme to improve understanding of Pfas pollution sources in England. They added: “We are screening sites to identify potential sources of Pfas pollution and prioritise further investigations, whilst assessing how additional control measures could reduce the risks of Pfas in the environment.”A spokesperson for the Department for Environment, Food and Rural Affairs said: “The government is committed to protecting human health and the environment from the risks posed by Pfas. That’s why we are working at pace together with regulators to assess levels of Pfas in the environment, their sources and potential risks to inform our approach to policy and regulation.”

Breaking Down the Force of Water in the Texas Floods

Flash floods last week in Texas caused the Guadalupe River to rise dramatically, reaching three stories high in just two hours

Over just two hours, the Guadalupe River at Comfort, Texas, rose from hip-height to three stories tall, sending water weighing as much as the Empire State building downstream roughly every minute it remained at its crest.Comfort offers a good lens to consider the terrible force of a flash flood’s wall of water because it’s downstream of where the river’s rain-engorged branches met. The crest was among the highest ever recorded at the spot — flash flooding that appears so fast it can “warp our brains,” said James Doss-Gollin, assistant professor of civil and environmental engineering at Rice University.The Texas flood smashed through buildings, carried away cars and ripped sturdy trees out by the roots, dropping the debris in twisted piles when the water finally ebbed. It killed more than 100 people, prompted scores of rescues and left dozens of others missing. The deaths were concentrated upriver in Kerr County, an area that includes Camp Mystic, the devastated girls' camp, where the water hit early and with little notice.Water is capable of such destruction because it is heavy and can move fast. Just one cubic foot of water — imagine a box a bit larger than the size of a basketball — weighs about 62 pounds (28 kilograms). When the river rose to its peak at Comfort, 177,000 cubic feet — or 11 million pounds (5 million kilograms) of water — flowed by every second.“When you have that little lead time ... that means you can’t wait until the water level starts to rise,” Doss-Gollin said. “You need to take proactive measures to get people to safety.” Water as heavy as a jumbo jet A small amount of water — less than many might think — can sweep away people, cars and homes. Six inches (15.2 centimeters) is enough to knock people off their feet. A couple of feet of fast-moving water can take away an SUV or truck, and even less can move cars.“Suppose you are in a normal car, a normal sedan, and a semitrailer comes and pushes you at the back of the car. That’s the kind of force you’re talking about,” said Venkataraman Lakshmi, a University of Virginia professor and president of the hydrology section of the American Geophysical Union.And at Comfort, it took just over 15 minutes for so much water to arrive that not only could it float away a large pickup truck, but structures were in danger — water as heavy as a jumbo jet moved by every second.At that point, “We are past vehicles, homes and things can start being affected,” said Daniel Henz, flood warning program manager at the flood control district of Maricopa County, Arizona, an area that gets dangerous scary flash floods.The water not only pushes objects but floats them, and that can actually be scarier. The feeling of being pushed is felt immediately, letting a person know they are in danger. Upward force may not be felt until it is overwhelming, according to Upmanu Lall, a water expert at Arizona State University and Columbia University.“The buoyancy happens — it’s like a yes, no situation. If the water reaches a certain depth and it has some velocity, you’re going to get knocked off (your feet) and floating simultaneously,” he said. The mechanics of a flash flood The landscape created the conditions for what some witnesses described as a fast-moving wall of water. Lots of limestone covered by a thin layer of soil in hilly country meant that when rain fell, it ran quickly downhill with little of it absorbed by the ground, according to S. Jeffress Williams, senior scientist emeritus with the U.S. Geological Survey.A flash flood generally starts with an initial lead wave and then builds as rain rushes over the landscape and into the river basin. It may rise quickly, but the water still takes some time to converge. The water crumpled cars into piles, twisted steel and knocked trees down as if they were strands of grass. Images captured the chaos and randomness of the water’s violence.And then, not as fast as it rose, but still quickly, the river receded.Five hours after its crest at Comfort, it had already dropped 10 feet (3 meters), revealing its damage in retreat. A couple of days after it started to rise, a person could stand with their head above the river again.“Everything just can happen, very, very quickly,” Henz said.Associated Press writer Seth Borenstein in Washington contributed.The Associated Press receives support from the Walton Family Foundation for coverage of water and environmental policy. The AP is solely responsible for all content. For all of AP’s environmental coverage, visit https://apnews.com/hub/climate-and-environmentCopyright 2025 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.Photos You Should See - June 2025

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