Data from the National Drought Mitigation Center shows rainfall in the southern Illinois city of Carbondale totaled 7.5 inches from the start of March to last week, down from 30.3 inches last year and 16.8 inches in a normal year.
Our list was compiled with the help of Bert Sperling, who created his Sperling Drought Index by combining a variety of data and indices from the National Climatic Data Center.