Police and firefighters went door to door in Dyer telling people to leave.
In southern Michigan, more than 100,000 customers were without power Saturday, utilities said. Powerful storms a day earlier spawned at least one tornado that destroyed several homes and barns in Fenton, and minor injuries were reported.
Three to five tornadoes may have hit southeastern Michigan, the weather service said. The region also had flooded highways and fallen power lines and trees.
Federal Emergency Management Agency Administrator R. David Paulison surveyed damage Friday in Rushford, Minnesota, especially hard hit by this week's flooding. Mayor Les Ladewig said about half of Rushford's 760 homes were damaged, including 248 that were destroyed and 91 with serious damage.
About 1,500 homes were damaged around Minnesota. Paulison said FEMA recovery centers should be running early next week in the three counties where President Bush declared disasters Thursday.
Paulison also visited Wisconsin, where flooding destroyed 44 homes and damaged more than 1,400, most of them in the southwestern part of the state. See images of flooding from all over »
In DeKalb, Illinois, 50 miles west of Chicago, the Kishwaukee River reached near-record levels, spilling over its 15-foot levees, flooding residential areas and blocking roads.
About 600 residents of DeKalb and nearby Sycamore were displaced, said DeKalb City Manager Mark Biernacki. Northern Illinois University's flooded DeKalb campus was closed.
Some flooding occurred in the area around Prospect Heights, six miles north of O'Hare International Airport west of Chicago.
"The river is so quiet for so many years," Mark Bednarowicz, 57, said as he filled sandbags for his home. "For everybody it's a shock it (flooding) happens. ... Everybody's scared."
