Chicago weather today: Extreme heat forecast prompts Chicago Heat Advisory; heat index exceeds 100 degrees in parts of area

CHICAGO (WLS) — Extreme heat is impacting the Chicago area on Monday afternoon after storms popped up in the morning hours.

The National Weather Service has announced a Heat Advisory effective from noon until 8 p.m. on Monday for several counties, including Boone, Cook, DeKalb, Will, Grundy, Kane, Kankakee, Kendall, LaSalle, Lake (IL), Livingston, McHenry, Ogle, Winnebago, Newton, Jasper, Lake (IN), and Porter. Additionally, a previously issued Severe Thunderstorm Warning for some areas has been lifted.

ABC7 Chicago is now streaming 24/7. Click here to watch

Afternoon temperatures rose to the low to mid-90s, but the heat index is expected to reach between 105 and 109 degrees, according to ABC7 Chicago AccuWeather Meteorologist Mark McGinnis.

But the heat is not stopping from coming to enjoy Monday night’s Summer Series concert at Millennium Park.

And heat or not, Lollapalooza kicks off on Thursday, and the work to get everything set up in time needs to be completed.

READ MORE | AC issue prompts hours-long bypass at Rush ER during extreme heat in Chicago: spokesperson

Crews have been working nonstop all over Grant Park, setting up stages, food tents and outside vendors.

It is a beehive of activity. ABC7 spoke to one of the folks getting it all done about what it is like to work in these conditions.

“Our priority is ensuring everyone’s safety. We might take a 15-minute break every half hour, which might be more than necessary. However, we have ample cold water, plenty of shade, hats, sunscreen, and sunglasses available,” said Thomas Hickman.

ABC7 also spoke to a pulmonary specialist at Northwestern Memorial Hospital earlier Monday.

Dr. Justin Fiala said people need to be attentive to how their body is reacting, especially if they are spending a significant period of time outdoors.

“If the heart rate is racing. If there is a pounding headache. Flushed skin, but dry skin, so you’re not sweating as much, as you ought to be those are signs that maybe you should reassess. Take a break from whatever you’re doing,” Fiala said.

Fiala said it is the humidity that the body struggles with the most. But the good news is that the Chicago area should catch a break from the sweltering conditions by the end of Tuesday. In the meantime, it is important to hydrate.

RELATED | Rising summer heat increases risk of child deaths in hot cars

Cook County Radar DuPage County Radar Will County Radar Lake County Radar (IL) Kane County Radar Northwest Indiana Radar


Copyright © 2025 WLS-TV. All Rights Reserved.

You May Also Like

Man charged with murder on cruise ship that returned to Texas port, victim identified

Man Charged in Cruise Ship Murder; Victim Identified at Texas Port

A man has been charged in the death of his wife, whose…
Ohio State suspends fraternity after video captures two people engulfed in flames

Ohio State Suspends Fraternity After Video Shows Two People on Fire

Ohio State University has suspended a fraternity after a disturbing video appeared…
The Aftermath of the Blue Tsunami of 2026: Is JD Vance Correct?

JD Vance’s Take on a 2026 Blue Wave and Its Aftermath

The votes had barely been counted when the fight over who was…
Feds bust boat smuggling 18 illegal migrants off California coast

Federal Agents Stop Boat Smuggling 18 Migrants Off California Coast

This is the shocking moment Border Patrol agents busted a boat smuggling…
IRGC operative lands on FBI’s Most Wanted Terrorists list over alleged plot to kill former Trump advisor

IRGC Operative Hits FBI’s Most Wanted in Ex-Trump Aide Kill Plot

The FBI on Tuesday added a member of Iran’s Islamic Revolutionary Guard…
San Diego utility customers erupt over proposed $270-a-year rate hike

San Diego Utility Customers Protest Proposed $270 Annual Rate Hike

San Diego Gas & Electric customers are pushing back against a proposed…
GOP's Mike Lawler leaves door open for NY governor run after re-election defeat

Mike Lawler Eyes New York Governor Run After Re-Election Loss

Republican Rep. Mike Lawler is ruling out another run for Congress after…
'SNL' writer’s sister vanished — now her boyfriend and rival face charges in deadly love triangle

SNL Writer’s Sister Vanished: Boyfriend and Romantic Rival Charged in Love Triangle Killing

Months before the sister of a “Saturday Night Live” writer vanished, court…
Nithya Raman inherits LA's $1B homelessness spending mess

Nithya Raman Faces Los Angeles’ $1 Billion Homelessness Spending Challenge

Los Angeles has committed more than $1 billion to addressing homelessness, yet…
California parents sue school district over kids’ grades, report-card comments

California Parents Sue School District Over Children’s Grades and Report Card Comments

Some California parents are refusing to let a poor grade—or even an…
TV anchor found dead with gunshot wound to head, officials arrest husband

TV Anchor Found Dead From Gunshot Wound; Husband Arrested, Officials Say

The husband of a Pakistani television anchor was arrested Sunday after she…
Iranian ‘King of Instagram' arrested by ICE hung with celebrities

Iranian ‘King of Instagram’ Arrested by ICE Had Celebrity Ties

The Iranian “King of Instagram” who posted scandalous photos with naked models…