Part of the roof at Frankie Woods McCullough Academy, a public school located at 3757 W. 21st Ave., was torn off, damaging the gymnasium and several classrooms.

The storms left behind some damage in parts of Lake County, Indiana, where WGN-TV crews spotted uprooted trees that damaged nearby homes and sidewalks.

A line of severe storms triggered a tornado warning in Will County and a tornado watch for a large swath of the southwest suburbs and northwest Indiana Wednesday afternoon, bringing dangerous wind, hail and blinding downpours.

Another line of severe storms is barreling toward the Chicago area, prompting a tornado watch through early evening in the southwest suburbs and Northwest Indiana.