Chicago

Chicago Bakes Like a Brick Oven as Heat Index Tops 105

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Published on June 30, 2026
Chicago Bakes Like a Brick Oven as Heat Index Tops 105Source: X/NWS Chicago

Chicago woke up Tuesday to one of those mornings where opening the door feels like stepping into a bathroom after a long shower. Temperatures hovered around 79°F with a dew point near 75°F, which is already uncomfortably sticky well before lunchtime. The National Weather Service is calling for highs in the mid-90s through Thursday, with heat index values climbing as high as 105°F during the peak afternoon hours. An Extreme Heat Warning went out early Tuesday and is set to stay in place through midnight Friday (12:00 a.m. CDT), with officials cautioning that overnight warmth will offer very little real relief.

Afternoon Heat and Winds

Afternoons will be hot and breezy, not exactly refreshing. Southwest winds are expected at 10 to 15 mph with gusts up to 30 mph and highs near 95°F today, while Wednesday could push even hotter with highs near 97°F. Outdoor workers and people with health conditions are urged to avoid heavy exertion between 2 p.m. and 6 p.m. and to reschedule strenuous activities when possible. These details and the warning come from NWS Chicago.

When Relief Might Arrive

There is at least a hint of a cooldown on the horizon. Some relief may arrive late Thursday into Friday as storm chances increase, with forecasts showing a growing likelihood of showers and thunderstorms Thursday night that could cool parts of the region. Friday looks more unsettled, with additional shower and thunderstorm chances hanging around through the holiday weekend, so anyone planning outdoor events should have a backup plan ready. If storms do fire up they will likely be scattered, which means some neighborhoods could score a decent soaking while others stay mostly dry and stuck in the heat.

Stay Cool And Where To Get Help

Basic heat survival rules are in full effect. Drink plenty of water, stay in air-conditioned spaces when you can, and never leave children or pets in parked cars, even for a short time. The city is activating cooling options, and residents can call 311 for wellness checks or to find the nearest open site, or view the city's cooling center map at Chicago cooling centers. Check on elderly neighbors, friends, or relatives, and consider shifting outdoor plans to earlier in the day to ease the strain of the late-afternoon heat.