U.S. megadrought worst in at least 1,200 years, researchers say

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  • The drought also shows no signs of letting up, with increasing temperatures causing the atmosphere to suck up more moisture. “It’s a slow-motion train wreck,” one scientist said.

By Denise Chow

The megadrought that has gripped the southwestern United States for the past 22 years is the worst since at least 800 A.D., according to a new study that examined shifts in water availability and soil moisture over the past 12 centuries.

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