US 'Red alert': Lake Mead falls to lowest water level since Hoover Dam's construction in 1930s
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PHOENIX – Lake Mead has declined to itsfollowing the construction of Hoover Dam, marking a new milestone for the water-starved Colorado River in a downward spiral that shows no sign of letting up.
The reservoir near Las Vegas holds water for cities, farms and tribal lands in Arizona, Nevada, California and Mexico. Years of unrelenting drought and temperatures pushed higher by climate change are shrinking the flow into the lake, contributing to the large mismatch between the demands for water and the Colorado’s diminishing supply.
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The lake's rapid decline has been outpacing projections from just a few months ago. Its surface reached a new low Wednesday night when it dipped past the elevation of 1,071.6 feet, a record set in 2016. But unlike that year, when inflows helped push the lake levels back up, the watershed is now so parched and depleted that Mead is projected to continue dropping next year and into 2023.
Lake Mead, the largest reservoir in the country, now stands at just 36% of full capacity.
Feds expected to declare official Lake Mead shortage this summer
In the past month, Mead has already fallen below the official threshold of a shortage, which the federal government is expected to declare in August. That will trigger major cuts in water allotments for Arizona, Nevada and Mexico next year. And even bigger water reductions could be forced upon the Southwest if the reservoir continues to drop, which government estimates show is likely.
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“It should represent an earthquake in people's sense of urgency, on all fronts,” said Felicia Marcus, a visiting fellow at Stanford University’s Water in the West program.
The reservoir’s continuing decline, Marcus said, should ring “alarm bells” across the West that the days of business-as-usual approaches are over and that "we need to accelerate everything we can to use less water.”
That includes speeding up efforts that cities and water agencies are already undertaking in parts of the Southwest, such as investing in recycling wastewater, capturing stormwater or cleaning up polluted groundwater, Marcus said. And it also includes promoting conservation and more efficient water use in a variety of ways, she said, from investing in water-saving technologies on farms to offering homeowners cash rebates to removing grass and replacing it with drought-tolerant landscaping.
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When police in Austin, Texas, responded to calls about a boat at the edge of Longhorn Dam earlier this week, they found it teetering over the edge --- with four people aboard. © Austin-Travis County EMS Four people were successfully rescued from a heart-stopping situation Thursday, after their boat got stuck, dangling over the Longhorn Dam in Austin, TX. Rescue workers with Austin-Travis County EMS, STAR Flight and the Austin Police Department worked together to pull the boat to safety. The group was rescued Thursday with the help of the Austin Police Department's lake patrol unit and other first responders.
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The Colorado River and its tributaries provide water for cities from Denver to Tucson and about 4.5 million acres of farmland from Wyoming to the U.S.-Mexico border. About 70% of the water diverted in the seven U.S. states is used for agriculture, flowing to fields of hay and cotton, fruit orchards and farms that produce much of the country’s winter vegetables.
The watershed has been ravaged by one of the driest 22-year periods in centuries. Scientists describe the past two decades as aworsened by climate change, and say the Colorado River Basin is undergoing “ ” that will complicate water management for generations to come.
In 2000, Lake Mead was nearly full and its surface was lapping at the spillway gates of the Hoover Dam. Since then, the reservoir has fallen nearly 143 feet. And it's now at the lowest levels since 1937.
Two years ago, representatives of the seven states that depend on the Colorado River met at Hoover Dam to sign acalled the Drought Contingency Plan, which laid out measures to take less water and share in reductions during a shortage to reduce the risks of Lake Mead falling to critically low levels.
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To get drinking water, Burlyn Cooper and his neighbors have to collect runoff from the rock face of a mountain. It’s contaminated, but it’s all they have."I've got so used to it, I wouldn't know how to act, to turn the faucet on and have good water," he said. "I can't imagine it.
But the declines have continued and the drought has intensified over the past year, with much of the watershed baking through thein 126 years of records. The river and its tributaries have dwindled, shrinking the flow into Lake Powell at the Utah-Arizona border, and in turn driving the receding water levels at Lake Mead.
Climate change means a 'thirstier' landscape
Over the past year, the declines in water levels have accelerated, outpacing previous estimates due to extremelyacross the watershed in the Rocky Mountains, where much of the river’s flow originates as melting snow. Hotter temperatures have made the whole watershed "thirstier," as climate researchers put it, eroding the flow of the river as vegetation draws more water and as more moisture evaporates off the landscape.
The changes are starkly visible along the shores of Lake Mead, below the “bathtub ring” of whitish minerals that coats the rocky desert slopes.
In just 12 months, the lake’s level has dropped nearly 20 vertical feet.
The reservoir reached record-low territory four days sooner than the federal Bureau of Reclamation had projected a little over two weeks ago.
Las Vegas weighs tying growth to conservation amid drought
CARSON CITY, Nev. (AP) — Record-breaking heat and historic drought in the U.S. West are doing little to discourage cities from planning to welcome millions of new residents in the decades ahead. From Phoenix to Boise, officials are preparing for a future both with more people and less water, seeking to balance growth and conservation. Development is constrained by the fact that 46% of the 11-state Western region is federal land, managed by agencies like the U.S. Forest Service and Bureau of Land Management that are tasked with maintaining it for future generations. © Provided by Associated Press FILE - In this Feb.
To adapt to the shifting shorelines at Lake Mead National Recreation Area, workers have beenand extending boat ramps.
“It's frightening that it's happening so quickly,” Marcus said. “I think people are surprised that it's so bad so soon, because of the role that temperature plays in aridification and sublimation — all those big words that just mean it's just so hot, the stuff evaporates, so that even the snow and precipitation we do get doesn't go anywhere near as far.”
She said the dropping levels of Lake Mead represent an emergency and should be treated as such.
“It's past yellow alert. It's the red alert,” Marcus said.
The response, she said, should be speeding up a range of actions to adapt to a smaller supply of water from the river.
“And fortunately, for a lot of the things we use water for, we can use a lot less water and we can use it more times than we do,” Marcus said. “There's plenty of room to become more efficient. It's just that we are in a bit of denial as to how bad it really can get.”
'We know what to do. We just have to turn up the volume'
During California’s last severe drought from 2012-2016, Marcus was chair of the State Water Resources Control Board, which adopted mandatory conservation rules for cities and towns. Those rules have had a lasting effect in reducing water use.
Overnight Energy: Lake Mead's decline points to scary water future in West | White House leads opposition to raising gas tax | Biden taps ex-New Mexico lawmaker for USDA post
TGIF! Welcome to Overnight Energy, your source for the day's energy and environment news. Please send tips and comments to Rachel Frazin at email@example.com . Follow her on Twitter: @RachelFrazin . Reach Zack Budryk at firstname.lastname@example.org or follow him at @BudrykZack . Today we're looking at the decline of Lake Mead's water levels, the White House doubling down against a gas tax hike, and a new Biden nominee for the USDA's undersecretary ofToday we're looking at the decline of Lake Mead's water levels, the White House doubling down against a gas tax hike, and a new Biden nominee for the USDA's undersecretary of rural development.
She said representatives of the seven states that depend on the Colorado River have done impressive work getting together and agreeing on previous deals like the Drought Contingency Plan. And they’re going to face negotiations again soon on how to manage shortages after 2026, when the existing rules are set to expire.
Officials from Arizona, Nevada, California and Mexico have been talking about other ways they might work together on long-term projects to shore up water supplies. One idea they’re studying would be for Arizona to work with Mexico to build aon the shore of the Sea of Cortez and trade some of the drinking water that’s produced for a portion of Mexico’s Colorado River water.
Officials from Las Vegas’ Southern Nevada Water Authority havein a in Southern California, which would enable the agency to use some of the Metropolitan Water District’s Colorado River water in exchange. Arizona water officials are also and taking part in the project.
Marcus said there are various promising efforts underway, and Lake Mead’s retreating shorelines show the region needs to pick up the pace.
“We have to get off our butts and go faster on all of it,” she said. “We know what to do. We just have to turn up the volume.”
That includes investing in infrastructure projects to reduce reliance on importing water from elsewhere, Marcus said, and investing in better sensor networks so that officials aren’t “guessing based on outdated models that weren't built for a climate change world.”
She offered another analogy for the Colorado River’s worsening crisis.
“The house is on fire and we're still rearranging the furniture and thinking about, you know, do we want to redecorate the kitchen?” Marcus said. “That's not to disparage all the work that's been done. It's just we have to do a lot more.”
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What Matters: The American West is drying out .
The incredible pictures of a depleted Lake Mead, on the California-Nevada border, illustrate the effects of drought brought on by climate change. © Google Earth Timelapse (Google, Landsat, Copernicus) Lake Mead in 2000 (left) and in 2020 (right). The lake, just east of Las Vegas on the Nevada-Arizona border, is the United States' largest reservoir. Levels have dropped around 143 feet since 2000, when it was last considered full. Later this year, the US government will almost certainly declare the first-ever water shortage along the Colorado River.