One weekend in May 2010, the weather forecast for Nashville, Tennessee, U.S.A., predicted 10 centimeters (4 inches) of rain. By Sunday, over 33 centimeters (13 inches) had fallen. Soon the city was flooded. On the roads, cars were covered by the rising water. “We’ve got buildings running into cars,” the news reported as a small building floated by. There were 11 deaths that weekend.