A sign over a highway in Glendale, Calif., warned motorists in February to save water in response to the state's severe drought. But a study released earlier this week showed residents in the southern coastal part of the state used more water this spring than they did last year. Robyn Beck/AFP/Getty Images hide caption

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There are signs around the reservoirs in Portland's Mount Tabor Park that warn against putting anything in the water. They apparently didn't dissuade one young man from urinating into the city's drinking supply this week. Randy L. Rasmussen /The Oregonian/Landov hide caption

itoggle caption Randy L. Rasmussen /The Oregonian/Landov

The long arms of pivot irrigation rigs deliver water from the Ogallala Aquifer to circular fields of corn in northwestern Kansas. Dan Charles/NPR hide caption

itoggle caption Dan Charles/NPR

An irrigation pivot waters a corn field in Nebraska. Many farmers in Nebraska and Kansas rely on irrigation to water their corn fields. But the underground aquifer they draw from will run dry. Nati Harnik/AP hide caption

itoggle caption Nati Harnik/AP

A worker dumps a bucket of tomatoes into a trailer in Florida City, Fla. Much of the lost and wasted weight in fruits and vegetables is water, according to a report by the World Resources Institute. Joe Raedle/Getty Images hide caption

itoggle caption Joe Raedle/Getty Images