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Drought Area Expands in Northern U.S. and Eases in South

Scientific American - Posted: September 20th, 2012, 12:20pm EDT

p(Reuters) - The worst drought to hit the United States in a half century expanded in the upper Midwest and northern Plains states in the past week due to warmer- and drier-than-normal weather, but loosened its grip on some central and southern areas of the country./ppNearly 65 percent of the contiguous United States were under at least moderate drought as of September 18, up from about 64 percent a week earlier, according to the Drought Monitor, a weekly compilation of data gathered by federal and academic scientists./ppHowever, the portion of the country under exceptional drought - the most dire classification - declined slightly to 5.96 percent from 6.23 percent a week earlier./ppThis U.S. a href=http://www.scientificamerican.com/article.cfm?id=drought-area-expands-in-northern-us[More]/a

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