A heat advisory is in effect across the Chicago area today, with storm chances set to increase through the weekend.

A line of fast-moving storms prompted severe thunderstorm warnings in the Chicago area and ground stops at O'Hare and Midway airports. There were also reports of storm damage.

The Chicago area is undergoing a second day of dangerous high temperatures Thursday, with heat index values over 100. Some severe storms are also rolling through the area. Much of the area remains ...