More stifling heat today before cold front hits by evening, bringing threat of thunderstorms

The high is expected to be near 99, just shy of the record of 101 set in 1988. The National Weather Service warned that the heat index could climb into the low 100s across northwest Illinois.

SHARE More stifling heat today before cold front hits by evening, bringing threat of thunderstorms
A group of people lounge on the rocks at Promontory Point, Tuesday, June 21, 2022. Temperatures reached nearly 100 degrees around the Chicagoland area.

A group of people lounge on the rocks at Promontory Point, Tuesday, June 21, 2022. Temperatures reached nearly 100 degrees around the Chicago area.

Tyler Pasciak LaRiviere/Sun-Times

The Chicago area will continue to swelter Tuesday, with temperatures in the upper 90s, before a cold front moves in by evening, bringing a chance of thunderstorms.

The high is expected to be near 99, just shy of the record of 101 set in 1988. The National Weather Service warned that the heat index could climb into the low 100s across northwest Illinois and could “lead to heat-related illness if outdoors for long periods of time.”

A cold front will bring a chance of thunderstorms in the evening, some of them severe from Peru to Aurora and Waukegan, with gusting winds and hail.

The high on Wednesday is expected to be 81, on Thursday 76.

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