The megadrought bedeviling the American West got even drier last year and is becoming the deepest dry spell in more than 1,200 years.
"Climate change is changing the baseline conditions toward a drier, gradually drier state in the West and that means the worst-case scenario keeps getting worse," said study lead author Park Williams, a climate hydrologist at UCLA. "This is right in line with what people were thinking of in the 1900s as a worst-case scenario. But today I think we need to be even preparing for conditions in the future that are far worse than this.
"For this drought to have just cranked up back to maximum drought intensity in late 2020 through 2021 is a quite emphatic statement by this 2000s drought saying that we’re nowhere close to the end," Williams said. This drought is now 5% drier than the old record from the 1500s, he said. "I was wondering if we’d ever see a year like 2002 again in my life and in fact, we saw it 20 years later, within the same drought," Williams said. The drought levels in 2002 and 2021 were a statistical tie, though still behind 1580 for the worst single year.
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