Co-Director of the Center for Watershed Sciences at UC-Davis, Jay Lund, joined Yahoo Finance Live to break down the gravity of the drought the Western U.S. is facing and why the water shortage could send food prices higher.
Farmers toil at the mercy of nature’s whims, which can prove particularly vexing in California.
Even before climate change, bouncing between drought and deluge was routine in the Central Valley, the state’s richest farming region. Humans have amplified these natural cycles by pumping greenhouse gases into the atmosphere, studies show, creating a future filled with what scientists recently dubbed “whiplash events.”
Scientists are calling it a “mega-drought” brought on by climate change. The latest U.S. Drought Monitor Map shows large areas of the Southwest are “exceptionally dry,” the worst category. It’s taking a dramatic toll on the Colorado River system that provides water to 40 million people in seven states — and may force the federal government to make a drastic and historic decision. For more than eight decades, the iconic Hoover Dam has relied on water from Nevada’s Lake Mead to cover up its backside. But now, at age 85, it finds itself uncomfortably exposed. Much of the water the dam is supposed to be holding back is gone.
Atmospheric carbon dioxide measured at NOAA’s Mauna Loa Observatory peaked for 2021 in May at a monthly average of 419 parts per million, the highest level since accurate measurements began 63 years ago, Scripps Institution of Oceanography in San Diego reported Monday.
Scripps scientist Charles David Keeling initiated on-site measurements of carbon dioxide atop the volcano on the Big Island of Hawaii in 1958. NOAA began measurements in 1974, and the two research institutions have made complementary, independent observations ever since.
In Sin City, one thing that will soon become unforgivable is useless grass. A new Nevada law will outlaw about 31% of the grass in the Las Vegas area in an effort to conserve water amid a drought that’s drying up the region’s primary water source: the Colorado River. Other cities and states around the U.S. have enacted temporary bans on lawns that must be watered, but legislation signed Friday by Gov. Steve Sisolak makes Nevada the first in the nation to enact a permanent ban on certain categories of grass.
In a major sign of California’s worsening drought, Santa Clara County’s largest water provider announced Monday that it is moving forward with plans to declare a water shortage emergency and to urge cities and water companies that serve 2 million residents in and around San Jose to impose mandatory water restrictions.
Just two years after California celebrated the end of its last devastating drought, the state is facing another one. Snowpack has dwindled to nearly nothing, the state’s 1,500 reservoirs are at only 50% of their average levels, and federal and local agencies have begun to issue water restrictions.
Governor Gavin Newsom has declared a drought emergency in 41 of the state’s 58 counties. Meanwhile, temperatures are surging as the region braces for what is expected to be another record-breaking fire season, and scientists are sounding the alarm about the state’s readiness.
Hoover Dam towers more than 700 feet above Black Canyon on the Arizona-Nevada state line, holding back the waters of the Colorado River. On top of the dam, where visitors peer down the graceful white arc of its face, one of its art deco-style towers is adorned with a work of art that memorializes the purposes of the dam.
In five relief sculptures by Oskar Hansen, muscular men grip a boat’s wheel, harvest an armful of wheat, stand beside cascading water and lift a heavy weight overhead. Words encapsulate why the dam was built, as laid out in a 1928 law: FLOOD CONTROL, NAVIGATION, IRRIGATION, WATER STORAGE and POWER.
More than half of the continental US is currently experiencing some level of drought, and about a quarter is in severe drought or worse. In recent years, the western and southwestern US has been in a seemingly continual state of reduced rainfall and snowpack. Droughts have many well-known, potentially catastrophic consequences, from crop failures to water shortages to wildfires. Yet they can also have more direct human health impacts by not only affecting how much water there is, but also the quality of that water.
