Increases in the heaviest 1 percent of all daily precipitation events in the U.S. from 1958 to 2007. Alaska has already seen a 23 percent increase in these events. New England has seen the greatest increase by a significant margin, at 67%. NRDC / U.S. Global Change Research Program

Increases in the heaviest 1 percent of all daily precipitation events in the U.S. from 1958 to 2007. Alaska has already seen a 23 percent increase in these events. New England has seen the greatest increase by a significant margin, at 67%.

Thirsty for Answers: Preparing for the Water-related Impacts of Climate Change in American Cities