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

Lynette Hooker's mom alleges Brian Hooker lied about daughter's disappearance, claims 'foul play'

Lynette Hooker’s Mother Accuses Brian Hooker of Lying About Disappearance, Suspects Foul Play

Months after Lynette Hooker disappeared in the Bahamas, her mother is publicly…
Disgusting video shows children riding boats in 'sewage brown' water at popular Maryland theme park

Video Shows Children Riding Boats Through Sewage-Brown Water at Maryland Theme Park

Small children were seen circling in boat rides through murky, “sewage brown”…
US Navy identifies sailor lost in Arabian Sea after helicopter's emergency water landing

US Navy Identifies Sailor Lost After Helicopter Emergency Landing in Arabian Sea

Officials awaiting update on missing Navy aircrewman Chief National Security Correspondent Jennifer…
West Virginia town's entire police force fired after ex-sergeant claims evidence room was broken into

Entire West Virginia Police Force Dismissed After Former Sergeant Alleges Evidence Room Break-In

A small town in West Virginia is currently without a functioning police…
Federal agent and his wife found shot dead in NJ home in apparent murder-suicide

Federal Agent and Wife Found Dead in New Jersey Home in Suspected Murder-Suicide

A federal special agent fatally shot his wife and then died by…
Erika Kirk comforts a stranger in tears during hearing for husband's accused assassin Tyler Robinson

Erika Kirk Comforts Tearful Stranger at Hearing for Tyler Robinson, Man Accused in Husband’s Killing

PROVO, Utah — A quiet but emotional moment unfolded Tuesday in a…
After Geneva Lake boat capsized, leaving 3 children dead, Chicago brothers recount rescues during strong storm

Chicago Brothers Describe Rescues After Geneva Lake Boat Capsizes in Storm, Killing 3 Children

CHICAGO (WLS) — A sudden, violent storm tore across Geneva Lake on…
Over 20 million Americans face relentless storms as worsening flash flood risks target Upper Midwest

20 Million Americans Brace for Severe Storms as Flash Flood Threat Surges Across Upper Midwest

A renewed flash flood risk is expected to linger across the Northern…
Dem Kentucky Gov. Andy Beshear demands health update on GOP Sen. Mitch McConnell

Kentucky Gov. Andy Beshear Presses for Public Update on Mitch McConnell’s Health

WASHINGTON — Kentucky Gov. Andy Beshear, a Democrat, called Wednesday for Sen.…
Cause of death revealed for Tim Horton’s customer Anita Grayson who died after fighting manager over drive-thru issue

Tim Hortons Customer Anita Grayson’s Cause of Death Revealed After Fatal Drive-Thru Dispute

A 75-year-old Indiana woman who died after a confrontation with Tim Hortons…
Graham Platner trying to put his ‘thumb on the scale’ as Maine Democrats look for replacement Senate candidate, state party claims 

Maine Democrats Accuse Graham Platner of Trying to Sway Search for New Senate Candidate

The Maine Democratic Party’s executive director accused Senate hopeful Graham Platner, whose…
Navy identifies missing sailor in Arabian Sea whose helicopter made emergency landing

Navy Identifies Sailor Missing After Helicopter Emergency Landing in Arabian Sea

The U.S. Navy on Tuesday named Cmdr. Gabriel Edwards as the missing…