The area at risk of flooding is highlighted in green on this map.
An ice jam along the Platte River in south-central Nebraska has pushed the river out of its banks in areas where lowland flooding typically occurs.
Sudden changes in river levels, up or down, are possible in southern Buffalo County over the next several days due to the ice jam, according to the National Weather Service.
Given the forecast for continued cold, it is difficult to say how long the threat of ice jam flooding will remain, the weather service said in the warning it issued this week.
Flooding is occurring south of Interstate 80 on what is called the North Channel of the Platte. The Interstate itself is not at risk of flooding.
The weather service reminds drivers to be careful around floodwaters because water depth and the speed of the current isn't always what it appears.