The National Weather Service has confirmed at least four tornado touchdowns in central Illinois Saturday night -- in Lostant, Streator, Dwight and Buckingham. Each community is about 80 to 100 miles southwest of Chicago.
The tornadoes that hit Streator and Dwight were each confirmed as EF-2 strength, with winds up to 137 mph. A damage survey team is checking a fifth tornado report from Elmwood.
Tornados also touched down in Michigan and in Ohio, where seven deaths were reported.
The heaviest damage occured in the following areas:
In Streator, the twister touched down at 9:11pm, causing significant damage, according to the National Weather Service. There were several injuries but the extent of those injuries is unknown. Phone lines were down and a LaSalle County sheriff said everything was "a mess". Six people were believed to be trapped in a collapsed structure, according to several reports.
Seventeen people were treated at an area hospital for injuries, according to Streator Mayor Jim Lansford. None of the injuries were believed to be life-threatening.
Lansford also said 30 buildings in the city were heavily damaged. More than 1,000 people in the town of about 14,000 people were without power Sunday. There were no fatalities in Streator, according to the News Tribune.
Illinois Emergency Management Agency spokeswoman Patti Thompson says the small town of Dwight, in Livingston County, was also hit hard. About 40 mobile homes and about 10 other homes were destroyed. She says more than a dozen people were injured and at least six were hospitalized.
Lake Township, Ohio
A tornado killed two people, according to ABC-13. Lake High School was also partially destroyed -- causing Sunday's graduation ceremonies to be postponed -- and the twister also caused a gas leak which crews are working to contain.
The heaviest damage was reported on County Road 3 between County roads D and E, according to the NBC affiliate there.
Dundee Township, Michigan
Tornado touchdown confirmed at 2:17am. State of emergency declared. The Fermi 2 nuclear power plant received damage to the outside wall and was automatically shut down at 3 a.m. No injuries were reported there, according to the Toledo Blade.
Editor's Note: This story has been updated with additional information from multiple sources.