The National Weather Service has issued a heat advisory starting at noon Friday as near record-breaking temperatures are expected after less severe thunderstorms move out of the area, officials said.
James Wright snapped this shot in Flanagan's parking lot in North Chicago shortly before the storm hit.
Thursday night's storms brought fierce lightning to the Chicago area and golfball-sized hail. ComEd reports 93,000 people were without power.
Shortly before the storm, the sky across Chicago and the suburbs turned a dangerous yellow. Hurricane-strength wind gusts of 94 mph were recorded south of the city.
The sky turned deadly dark just before the storm hit.
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