Tornado sirens were set off inadvertently in DuPage County early Tuesday morning, village officials said.
Residents in Orland Park are continuing cleanup and repair work after Monday's storm, while some homeowners report an increase in unsolicited offers from contractors seeking business in storm-damaged neighborhoods.
At least four tornadoes touched down in the Chicago area on Monday, the National Weather Service confirmed.
Preliminary data indicates it was an EF3 tornado, the weather service said, stronger than the EF2 estimate they made Monday.
Gov. JB Pritzker on Tuesday issued a state disaster proclamation for 11 counties ravaged by severe weather this spring and early summer.
Community members and volunteers spent Friday working across Merrillville to help residents recover from an EF-2 tornado that tore through the town about two weeks ago.