The Chicago area is under level 2 out of 5 risk ... counties until 1 a.m. Monday. A Tornado Warning was previously in effect for Cook, Kane and DeKalb counties in Illinois, but it has expired.

The red flag warning will expire on Monday ... The system bringing the cold air also brings a risk for severe weather. As of Monday afternoon, Chicago is at a risk level of 2 out of 5.

Warning Sirens Sound Across Chicago as Tornadoes Approach The National Weather Service said a tornado touched down near Chicago’s O’Hare International Airport on Wednesday, disrupting hundreds ...