Western megadrought is worst in 1,200 years, intensified by climate change, study finds

Tree stumps rise from parched earth in the Nevada ghost town of St. Thomas, which was submerged after the construction of Hoover Dam in the 1930s but has reemerged as the water level at Lake Mead has fallen to its lowest point in history amid an ongoing megadrought. (Luis Sinco / Los Angeles Times)

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