Hazard Report Provided By forecast.weather.gov

URGENT - WEATHER MESSAGE
National Weather Service Chicago IL
202 AM CDT Mon Jun 29 2026

ILZ103>105-291715-
/O.CON.KLOT.XH.W.0001.260629T1700Z-260702T0300Z/
Northern Cook-Central Cook-Southern Cook-
Including the cities of Orland Park, Oak Park, Cicero, Calumet
City, Evanston, Park Forest, Oak Forest, La Grange, Lemont,
Chicago, Schaumburg, Northbrook, Palatine, Des Plaines, and Oak
Lawn
202 AM CDT Mon Jun 29 2026

...EXTREME HEAT WARNING REMAINS IN EFFECT FROM NOON TODAY TO 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...From noon today to 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
315 AM CDT Mon Jun 29 2026

ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-300815-
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-
315 AM CDT Mon Jun 29 2026 /415 AM EDT Mon Jun 29 2026/

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

.DAY ONE...Today and Tonight.

Weather hazards expected...

  Elevated Excessive Heat Risk.

DISCUSSION...

Dangerous heat with afternoon heat index values over 100 degrees
is expected today. Heat index values will remain above 75 in most
areas tonight, offering little relief from the heat.

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

Tuesday and Wednesday...
  Elevated Excessive Heat Risk.
Thursday...
  Limited Flooding Risk.
  Limited Thunderstorm Risk.
  Elevated Excessive Heat Risk.
Friday...
  Limited Flooding Risk.
  Limited Thunderstorm Risk.
Saturday and Sunday...
  Limited Thunderstorm Risk.

DISCUSSION...

Dangerous heat with afternoon heat index values over 100 degrees
is expected to persist through at least Wednesday. Depending on
potential thunderstorm coverage late in the week, the dangerous
heat may persist into the weekend. It does appear that a more
active pattern will return by the weekend, with a return of
more frequent thunderstorm chances.

.SPOTTER INFORMATION STATEMENT...

  Spotter activation will not be necessary through tonight.

$$

Hazard Report Provided By forecast.weather.gov