Starting early Wednesday, the area could see showers, thunderstorms and wind gusts up to 30 mph, the National Weather Service said. Chicago's OEMC is advising residents to reduce water usage to put less stress on sewers.

Chicago and Northwest Indiana are already under an enhanced risk, level 3 out of 5, for severe storm potential Wednesday.

Damage Assessment: Gary, Indiana experienced the brunt of the storm's fury, with winds exceeding 75 mph toppling trees and damaging homes. Initial clean-up reports indicate widespread destruction, requiring emergency response teams to assist affected residents.