Chicago flash flooding caused sudden road washouts, and water rescues had to be made at more than one location on the West Side.

A tornado watch has been issued until 11 p.m. Friday for Cook County and most of northern Illinois. Strong storms are expected to hit the Chicago area between 8 p.m. and midnight, the National Weather Service said.

Seniors living on the West Side of Chicago are demanding answers for the constant flooding problem in the area.

Chicago experiences severe flooding after 5 inches of rain in 90 minutes, creating dangerous conditions across downtown.

In parts of Chicago, flash flood alerts rang Tuesday, warning of dangerous conditions as cars were stranded and submerged on highways and water rescues were conducted, but how much rain actually fell across the region and how fast did it all happen?

Clean-up efforts continue after heavy rain fell on Chicago’s West Side during a short amount of time Tuesday night, leaving some drivers flooded out in underpasses and several

More than a month's worth of rain fell on Chicago in 90 minutes on Tuesday evening, according to the National Weather Service (NWS). "There were numerous reports of flooded viaducts, several reports of water rescues, and a few reports of flooded basements," the NWS said.

The quick-falling rain led some parts of Chicago and Cook County to get upwards of five inches of rain in less than three hours.

More than 170 people are still believed to be missing a week after the forceful floodwater hit over the July Fourth weekend.