Before moving on to northwest Indiana, the storm knocked down trees and caused flooding in different spots around the area.
It was a night of watches and warnings, with reports of large hail and damaging winds.
Warm temperatures and stormy weather combined to flood streets in Bridgeview.
Residents wearing shorts were stranded in their driveways as they wait for the water to recede.
Near 91st and Harlem the nasty weather brought down a tree, crashing onto a fence and then onto the roof of a house.
An entire parking lot in Hickory Hills was flooded out as is the area where drivers pull in.
While generators are working overtime, from the looks of many streets in the southwest suburbs it's likely to be a very long night.
A funnel cloud was reported spotted near Rensselaer, Ind., but it did not cause significant damage.
"We were not able to confirm that it touched down," said Rensselaer Police Chief Jeff Phillips. "Most of the power has been restored to the city."
There is a chance for more storms very late Sunday night and into Monday morning.