Volunteers filled sandbags and homeowners began moving things out of their basements on Saturday, and one small town evacuated about 100 homes in preparation for flooding along the Cedar River in Iowa.
The river is expected to crest Tuesday in Cedar Rapids, Iowa's second largest city with a population of about 130,000. But with more rain expected Saturday night, officials there warned people to evacuate downtown areas of the city near the river by 8 p.m. Sunday.
"We have emergency personnel that can help you if needed," Cedar Rapids Mayor Ron Corbett said Saturday. "They'll risk their lives for you. But we don't want them to risk their lives."