Back-to-back storms on Tuesday and Wednesday dumped 4 to 8 inches of rain on parts of north-central Nebraska.
Officials in Brown and Rock Counties on Thursday asked drivers to stay off roads entirely as they took stock of washed-out roads, bridges and culverts.
As waterways rose overnight, firefighters conducted at least one water rescue north of Ainsworth early Thursday after a pickup fell into flooded Bone Creek, according to radio station KBRB.
The 35-year-old driver slipped and fell trying to get out of the truck and was swept 200 to 300 yards downstream by a fast-moving current before she was able to grab onto a tree, KBRB said.
Firefighters and rescuers were able to locate her by the light on her cellphone. The woman spent about 20 minutes in the water.