Hazard Report Provided By forecast.weather.gov

URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
313 PM CDT Mon Jun 29 2026

ILZ103>105-300615-
/O.CON.KLOT.XH.W.0001.000000T0000Z-260702T0300Z/
Northern Cook-Central Cook-Southern Cook-
Including the cities of Oak Lawn, Schaumburg, La Grange, Cicero,
Orland Park, Oak Park, Des Plaines, Evanston, Park Forest,
Lemont, Palatine, Northbrook, Calumet City, Oak Forest, and
Chicago
313 PM CDT Mon Jun 29 2026

...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 10 PM CDT
WEDNESDAY...

* WHAT...Dangerously hot conditions with heat index values around
  105 expected each afternoon.

* WHERE...Central Cook, Northern Cook, and Southern Cook Counties.

* WHEN...Until 10 PM CDT Wednesday.

* IMPACTS...Heat related illnesses increase significantly during
  extreme heat and high humidity events.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

The magnitude of anticipated heat, combined with oppressive warmth
at night will lead to hazardous conditions, particularly for the
elderly and those with pre-existing health conditions. Residents of
the city of Chicago can call 3 1 1 to request well being checks for
elderly friends or family members, or for information on finding the
nearest cooling center.

&&

$$

Hazardous Weather Outlook
National Weather Service Chicago/Romeoville IL
215 PM CDT Mon Jun 29 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-301915-
Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-De Kalb-Kane-DuPage-
La Salle-Kendall-Grundy-Kankakee-Livingston-Iroquois-Ford-
Northern Cook-Central Cook-Southern Cook-Northern Will-
Southern Will-Eastern Will-Lake IN-Porter-Newton-Jasper-Benton-
215 PM CDT Mon Jun 29 2026 /315 PM EDT Mon Jun 29 2026/

This Hazardous Weather Outlook is for portions of north central
Illinois...northeast Illinois and northwest Indiana.

.DAY ONE...Tonight.

Weather hazards expected...

  Elevated Excessive Heat Risk.

DISCUSSION...

Oppressive heat will continue into this evening, especially in the
city of Chicago where heat indices will likely not drop below 90
until around midnight.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday and Wednesday...
  Significant Excessive Heat Risk.
Thursday...
  Elevated Excessive Heat Risk.
Thursday night through Saturday...
  Limited Flooding Risk.
  Limited Thunderstorm Risk.
  Limited Excessive Heat Risk.
Sunday...
  Limited Thunderstorm Risk.

DISCUSSION...

Dangerous heat will persist through Wednesday or Thursday.
Thunderstorm chances will increase late Thursday and continue at
times through the holiday weekend.

.SPOTTER INFORMATION STATEMENT...

  Spotter activation will not be necessary through tonight.

$$

Hazard Report Provided By forecast.weather.gov