Nation Megadrought: Western U.S. dry spell is worst in 1,200 years, study says February 14, 2022Doyle Rice, USA TODAYComments Off on Megadrought: Western U.S. dry spell is worst in 1,200 years, study says The intense dry spell that's parched the western U.S. the past 22 years is the region's worst "megadrought" since at least the year 800.