Severe storms moving into the Chicago area are bringing dangerous flash flood threats on Friday afternoon. There is a flash flood warning in effect for Cook and DuPage counties until 2:45 p.m. A ground stop has been issued at O'Hare and Midway airports as storms move into the area.

As of 12:30 p.m., heavy rain had already started to fall in some parts. A flash flood warning was in effect for DuPage and Cook County, the NWS said, with reports of "totally submerged viaducts and underpasses in the city of Chicago."

Torrential rains nearing 5 inches in just a few hours led to flash flooding across parts of Chicago on Friday afternoon, snarling both traffic on the ground and in the air.