More than 60 percent of the United States is in drought or experiencing abnormally dry conditions, according to Mark Svoboda, a climatologist for the National Drought Mitigation Center at the University of Nebraska at Lincoln, who said the drought stretches from Georgia to Arizona and north as far as Wisconsin, Minnesota and Montana.
The Dakotas are the worst-hit, where weeks of unbroken 100-degree days have scorched crops and dried up ponds and streams, leaving dry alkali dust free to be picked up and blown by the wind, a phenomenon that hasn’t been seen in the area since giant dust storms swept the Midwest during the Great Depression in the 1930s.
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