Heat index values, the “feels like” temperatures, could potentially reach 110 degrees on Tuesday. Overnight temperatures are only expected to drop to the mid- to upper 70s. Climate change is making the Chicago area more humid, which increases the heat index and makes the nights hotter. While everyone is encouraged to drink plenty of fluids and seek air conditioning, older adults, children and people with upper respiratory issues are advised to avoid outdoor exposure for extended periods.
Clouds move over the Chicago skyline as a storm system passes through the area on Aug. 27, 2024. (Armando L. Sanchez/baiduhai)A storm creates dangerous swimming conditions through 9 p.m. in Chicago at Ohio Street beach on Aug. 27, 2024. (Tess Crowley/baiduhai)
A storm rolls in at Ohio Street beach after a day of the heat index at triple digits on Aug. 27, 2024. (Tess Crowley/baiduhai)A storm rolls in at Ohio Street beach after a day of the heat index at triple digits on Aug. 27, 2024. (Tess Crowley/baiduhai)A storm creates dangerous swimming conditions through 9 p.m. in Chicago at Ohio Street beach on Aug. 27, 2024. (Tess Crowley/baiduhai)
People take cover under the Ohio Street underpass while a storm rolls in after a day of the heat index at triple digits on Aug. 27, 2024. (Tess Crowley/baiduhai)Joanna Kondracki-Miro lowers her dog Bailey into a small tub of water to cool him off at Wilson and DuSable Lake Shore Drive on a hot and humid day in Chicago on Aug. 27, 2024. (Chris Sweda/baiduhai)Yharemys Katiuska Lugo and Jesus Leon help push a friend out of the water near Ohio Street beach while sweltering temperatures and heightened pollution levels continue to grip the Chicago area on Tuesday, which is likely the “hottest day of the heat wave,” according to the National Weather Service in Chicago on Aug. 27, 2024. An excessive heat warning remains in effect until 10 p.m. in northern Illinois, as the weather service warns of a heat index — what the temperature feels like when humidity is combined with air temperature — of 110 to 115 degrees. (Tess Crowley/baiduhai)
Children play in the water at Crown Fountain on Tuesday, Aug. 27, 2024. (Eileen T. Meslar/baiduhai)Pedestrians are seen in the late afternoon at Wacker Drive and Wells Street in Chicago on Tuesday, Aug. 27, 2024, after the city sweltered through two days of excessive heat warnings. (Terrence Antonio James/baiduhai)Bal, no last name given, from Canada, holds a cup of ice to her neck on Michigan Avenue while sweltering temperatures and heightened pollution levels continue to grip the Chicago region on Tuesday Aug. 27, 2024. (Tess Crowley/baiduhai)
Teenagers plunge into Lake Michigan as people cool off from the heat and humidity near Montrose Beach in Chicago on Aug. 27, 2024. (Chris Sweda/baiduhai)With Chicago under an excessive heat warning, a woman cools off at Crown Fountain at Millennium Park on Tuesday, Aug. 27, 2024. (Terrence Antonio James/baiduhai)A couple relaxes in the shade at Montrose Beach on a hot and humid day in Chicago on Tuesday, Aug. 27, 2024. (Chris Sweda/baiduhai)
With the city under an excessive heat warning, people are seen at Wacker Drive and State Street in Chicago in the late afternoon on Tuesday, Aug. 27, 2024. (Terrence Antonio James/baiduhai)With the city under an excessive heat warning, children cool off at Crown Fountain at Chicago’s Millennium Park on Tuesday, Aug. 27, 2024. (Terrence Antonio James/baiduhai)Miguel Orozco wipes his face on Michigan Avenue while sweltering temperatures and heightened pollution levels continue to grip the Chicago region on Tuesday Aug. 27, 2024. An excessive heat warning remains in effect until 10 p.m. in northern Illinois, as the weather service warns of a heat index — what the temperature feels like when humidity is combined with air temperature — of 110 to 115 degrees. (Tess Crowley/baiduhai)
A person relaxes in the sand at Montrose Beach on a hot and humid day in Chicago on Tuesday, Aug. 27, 2024. (Chris Sweda/baiduhai)
A woman fans herself on the Riverwalk on Tuesday, Aug. 27, 2024. (Eileen T. Meslar/baiduhai)Children cool off at Crown Fountain at Chicago’s Millennium Park on Tuesday, Aug. 27, 2024. (Terrence Antonio James/baiduhai)
A cyclist bikes along the Lakefront Trail near Ohio Street beach while sweltering temperatures and heightened pollution levels continue to grip the Chicago region Tuesday, which is likely the “hottest day of the heat wave,” according to the National Weather Service in Chicago on Aug. 27, 2024. (Tess Crowley/baiduhai)A person uses a shirt to wipe her face on the Riverwalk on Tuesday Aug. 27, 2024. (Eileen T. Meslar/baiduhai)Tamara Foncerrada walks down Michigan Avenue with her dogs Maxwell and Jagger on Tuesday. Aug. 27, 2024. The walk lasted a minute and a half due to the temperatures. (Tess Crowley/baiduhai)
A man walks across Wabash Avenue near Wacker Drive in the Loop on Tuesday, Aug. 27, 2024. (Eileen T. Meslar/baiduhai)Children play in the water at Crown Fountain on Tuesday, Aug. 27, 2024. (Eileen T. Meslar/baiduhai)Chang Liu, of South Bend, IN, cools off at Burnham Park in Chicago after a 27-mile bike ride in the city with the region under an excessive heat warning on Monday, Aug. 26, 2024. (Terrence Antonio James/baiduhai)
People walk west on Adams Street toward Union Station in Chicago in the afternoon sunlight as the temperature hovers near 100 degrees on Aug. 26, 2024. (Terrence Antonio James/baiduhai)Caroline McIntyre, 2, plays at Margaret Donahue Park in Lake View on Monday, Aug. 26, 2024. (Eileen T. Meslar/baiduhai)People relax in the shade as a cyclist rides by at Burnham Park in Chicago with the region under an excessive heat warning on Monday, Aug. 26, 2024. (Terrence Antonio James/baiduhai)
Paletero Gonzalo Garcia walks on North Avenue Beach selling ice cream on Aug. 26, 2024. Chicagoans filled the beaches around the city as the National Weather Service issued an excessive heat warning from Monday afternoon to Tuesday evening. (Eileen T. Meslar/baiduhai)Reflected afternoon sunlight splashes onto pedestrians and steps on Wacker Drive near Adams Street in Chicago on Monday, Aug. 26, 2024, with the temperature hovering near 100 degrees. (Terrence Antonio James/baiduhai)Aidan Pazan, of Chicago, exercises at Burnham Park in Chicago with the region under an excessive heat warning on Monday, Aug. 26, 2024. (Terrence Antonio James/baiduhai)
A jogger runs near North Avenue Beach on Monday, Aug. 26, 2024. (Eileen T. Meslar/baiduhai)
