The National Weather Service issued a flash flood warning for Chicago, urging 600,000 residents to take precautions. More rain is expected overnight, with storms anticipated Saturday afternoon. Residents were seen wading through knee-deep water amid the severe weather disruptions.

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.

After a spell of rain and cooler weather, high temperatures will roll across Chicago and the suburbs later this week. Dangerously high heat and humidity are forecast for Wednesday and Thursday, with the National Weather Service issuing a extreme heat watch early Monday.

Chicagoans are stepping up to help one another during another heat wave in the city. The temperature reached 94 degrees Wednesday, with a heat index of 105, according to the National Weather Service. An extreme heat warning is in effect through much of Thursday, when temperatures are forecast at a high of 94 and a heat index of 103.

The powerful storms also led to ground stops at O'Hare and Midway, and may have even played a role in a gas station explosion near Chicago.

Chicago faces a Heat Advisory with temperatures reaching 95°F and a heat index of 100-110°F until 10 p.m. Thursday.

A heat advisory has been issued for all of Chicagoland on Wednesday and Thursday as temperatures and humidity spike.

The Chicago area has felt less of an impact from the Trump administration’s National Weather Service cuts than offices in the Quad Cities and downstate Lincoln.