'Megadrought' emerging in the western US might be worse than any in 1,200 years

Fueled in part by human-caused climate change, a “megadrought” appears to be emerging in the western U.S., a study published Thursday suggests. In fact, the nearly-20-year drought is almost as bad or worse than any in the past 1,200 years, scientists say. Megadroughts – defined as intense droughts that last for decades or longer – once plagued the Desert Southwest. Thanks to global warming, an especially fierce one appears to be coming back:

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