This map shows the percentage increases in very heavy precipitation (defined as the heaviest 1 percent of all event) from 1958 to 2007 for each U.S. region. There are clear trends toward more very heavy precipitatin for the nation as a whole, and particularly in the Northeast and Midwest. Updated from Groisman, at al., via 350.org

This map shows the percentage increases in very heavy precipitation (defined as the heaviest 1 percent of all event) from 1958 to 2007 for each U.S. region. There are clear trends toward more very heavy precipitation for the nation as a whole, and particularly in the Northeast and Midwest. Updated from Groisman, et al., via 350.org

Climate Signals: Extreme Weather Guide