Emergency management officials began evacuating an area about 5 miles (8.05 kilometers) west of the Kansas college town of Manhattan around 5 a.m. Wednesday. Evacuations also are underway in part of Marion County in the central part of the state.
Near the Oklahoma border, flooding closed a stretch of the Kansas Turnpike. And there were numerous water rescues in Augusta, which is about 25 miles (40 kilometers) east of Wichita.
Flash flood watches also are in effect in Missouri, Nebraska, Arkansas, Oklahoma and Texas, as well as flood warnings along the Mississippi River. The river was expected to crest Wednesday night in Cape Girardeau, Missouri, at a level that causes thousands of acres to flood.