
At least eight tornadoes touched down in four counties in northeastern Illinois, including four in Cook County, which is home to Chicago, as officials warned people to take shelter.
All departures of commercial flights into O’Hare and Midway airports were grounded, and outgoing flights from the two airports were delayed, the US Federal Aviation Administration reported.
More than 300 flights in and out of O’Hare and another 32 in and out of Midway were cancelled, according to FlightAware.
Trees were uprooted and roofs blown off in the Cook County town of Countryside, and car windows were blown out in La Grange, the National Weather Service reported. Tree and roof damage was also reported from several other twisters, the service said.