In Indiana, as many as 2,000 people are without power after strong storms knocked down powerlines.
A flash flood watch is in effect for Boone; Cook; De Kalb; DuPage; Ford; Grundy; Iroquois; Kane; Kankakee; Kendall; Lake; Lee; McHenry; Ogle; Will; Winnebago counties.
A WATCH means conditions are favorable for activity in and close to the area.