A large tornado has damaged homes, toppled power lines and overturned semitrailers across Chicago's southern suburbs, AP reported.
A tornado warning was also issued Saturday evening for the city's northern suburbs.
Trooper Mark Dorencz says one person was injured on Interstate 57 in the southern suburbs. A swath of the major highway is closed as authorities clear overturned trucks.
The National Weather Service says the large tornado touched down between the towns of Richton Park and University Park, then moved northeast.
Will County Sheriff's Department spokesman Pat Barry says the tornado damaged several homes in the Wilmington area.