River flood risks increase around the globe under future warming.

“More than half of the United States must at least double their protection level within the next two decades if they want to avoid a dramatic increase in river flood risks,” says lead-author Sven Willner from the Potsdam Institute for Climate Impact Research (PIK). Without additional adaptation measures – such as enhancing dykes, improved river management, increasing building standards, or relocating settlements – the number of people affected by the worst 10 percent of all river flooding events will increase in many places …..”