Flash flood and severe storm warnings are in effect in the south suburbs and northwest Indiana as a second wave of rainfall rolls into the area Sunday.
The storm warning for Will County and Lake County, Ind., was initially slated to last until 4:15 p.m. but was extended to 4:45 p.m., according to the National Weather Service.
The flash flood warning, set just after 4 p.m., is in place for both counties until 10 p.m. The weather service warned that fairgrounds have a heightened danger of flooding.
The storms could bring 70-mph winds and half-dollar-sized hail, forecasters said.
Most of the area south of Interstate 80 is under a severe storm watch until 8 p.m.