Chicago, IL – Northern Illinois and northwest Indiana are bracing for a stretch of dangerous weather through Tuesday, as high heat combines with multiple rounds of thunderstorms. Afternoon heat index values are expected to reach 100 to 105°F, with some inland areas south of I-80 feeling closer to 110°F, according to the National Weather Service (NWS) Chicago.
Thunderstorms Expected Tonight and Saturday
The NWS Chicago reports that clusters of storms are likely tonight and Saturday, with the strongest activity occurring Saturday afternoon and evening. These storms may bring torrential rainfall, damaging winds capable of downing trees, and frequent lightning strikes. Areas experiencing repeated storms could face elevated flooding risks, particularly in low-lying neighborhoods.
Travel and Safety Concerns Across the Region
Cities including Chicago, Rockford, Joliet, and Gary may experience travel delays due to heavy rain and ponding on roads. Communities along the Lake Michigan shore will see slightly cooler conditions, but inland residents should limit outdoor activities during the hottest part of the day. Officials urge residents to stay hydrated, check on vulnerable neighbors, and have multiple ways to receive weather alerts.
Hot, Humid Air Returns Monday
Storm chances will taper slightly on Sunday before increasing again on Monday, bringing another round of hot, humid air and thunderstorms. The dangerous conditions are expected to ease by midweek, though residents should remain alert for additional advisories if storm tracks change.
Five-Day Chicago, IL Forecast
- Tonight: Lows 70–75°F, 40% chance of thunderstorms
- Saturday: Highs 88–94°F, heat index up to 105°F, scattered storms, 30–40% chance
- Sunday: Highs 86–94°F, 20–30% chance of storms, cooler near the lake
- Monday: Highs 89–95°F, 40–50% chance of storms
- Tuesday: Highs 84–91°F, 30% chance of storms
How are you planning to stay safe during this heat and storm stretch? Share your tips in the comments below.
