Flooding has reached record levels at 17 locations across Nebraska.
Nearly 300 people have been rescued from high water across the state.
There have been fatalities reported.
Authorities say 52-year-old Aleido Rojas Galan of Norfolk died Friday night in southwestern Iowa.
Officials say Galan and two others were in a vehicle that drove around a barricade and was swept away.
The other two men survived.
On Thursday, 50-year-old James Wilke of Columbus, Nebraska, died when a bridge collapsed as he used a tractor to try and reach stranded motorists.
A Norfolk man was seen on top of his flooded car late Thursday before being swept away.
Water also swept away a man after a dam collapse. Both men are still missing.