An Extreme Heat Warning June 29 thru July 1, Chicago

Last edited Sun Jun 28, 2026, 06:37 PM - Edit history (1)

https://www.chicago.gov/city/en/depts/oem/provdrs/emerg_mang/news/2026/June/ExtremeHeatWarning.html




Extreme Heat Warning
June 28, 2026
Residents can expect dangerously hot conditions with possible heat index values around 105°

WHAT: An Extreme Heat Warning has been issued by the National Weather Service (NWS) in Chicago for Cook County.

WHEN: The Warning will be in effect beginning Monday, June 29 at 12 p.m. through Wednesday, July 1 at 10 p.m.

IMPACT: Heat-related illnesses increase significantly during extreme heat and high humidity events. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Well-Being Checks

The magnitude of the anticipated heat, combined with oppressive warmth at night will lead to hazardous conditions, particularly for the elderly and those with pre-existing health conditions. It’s important to check on relatives, neighbors, seniors and our vulnerable populations. If you are unable to make contact, you can request a well-being check by downloading the CHI311 app, visiting 311.chicago.gov, or calling 3-1-1. If there is a medical emergency due to a heat-related illness, call 9-1-1.