(CHICAGO) About 4,400 homes remain without power Sunday after powerful storms pounded the area following a third day of stifling heat and humidity.

The storms tapered off about 10 p.m. Saturday as the National Weather Service allowed a severe thunderstorm watch to expire. Nearly 9,000 homes were without power following the storm, according to ComEd. Outages were scattered throughout the Chicago area with 270 utility crews working to restore power.

Scattered thunderstorms could return Sunday afternoon and into the evening with localized rainfall, damaging winds and large hail possible, according to the weather service. Temperatures were expected to hit a steamy 93 degrees. A heat advisory was put in effect until 7 p.m. as heat index values could make temperatures feel more like 111 in some areas.

A flood advisory went into effect for the Chicago area early Sunday, advising residents that at least 3 inches of rain fell late Saturday afternoon and evening, resulting in rapid rises on the Chicago River overnight, according to the weather service. By 9 a.m. Sunday morning, the river level rose over 5 feet and was expected to rise to 6 feet by the afternoon.

About 1 a.m., flooding temporarily closed all lanes of the Edens Expressway (I-94) near north suburban Northfield, according to Illinois State Police. The Illinois Department of Transportation responded to the scene to pump the flood waters out.

At the Winnetka Avenue underpass, water was at least 3-feet high, Northfield Assistant Fire Chief Tom Burke told reporters at the scene. Firefighters rescued at least five people trapped in their cars in the area.

“Quite a bit of rain here tonight,” Burke said.