Chicago, IL – Sweltering heat is gripping the Chicago area today, with temperatures soaring into the low 90s and heat indices closing in on 100 degrees. Afternoon outdoor plans could be risky as heat and humidity combine for hazardous conditions.
According to the National Weather Service, an excessive heat risk is in effect for all of northeast Illinois and northwest Indiana through tonight. Saturday brings no relief—expect another steamy day, followed by growing chances for severe thunderstorms after sunset. The primary threat late Saturday is for strong, locally damaging winds, mainly along and west of I-55, with flash flooding possible in heavy downpours.
Sunday stays hot and humid, with storms redeveloping in the afternoon. While not every neighborhood will see severe weather, rapid changes are likely, and localized flooding or brief power outages can’t be ruled out. If you have plans for Lollapalooza or city events, stay hydrated, find shade, and have a backup plan for possible shelter from lightning or gusty winds.
Prepare for heat-related impacts on transit, parks, and outdoor work. Limit strenuous activity in the afternoon, check on vulnerable neighbors, and be weather-aware, especially if driving during storms.
Hazardous weather continues into early next week, with daily storm chances and sticky humidity lingering through Wednesday. More advisories could be issued as the situation evolves—stay tuned for updates.
Five Day Chicago, IL Outlook:
- Friday: Heat index up to 96°F, sunny. High 91°F, low 76°F.
- Saturday: Heat, storms possible late. High 93°F, low 77°F.
- Sunday: Hot, chance of thunderstorms. High 90°F, low 75°F.
- Monday: Showers and storms likely. High 87°F, low 73°F.
- Tuesday: Showers, possible thunder. High 87°F, low 73°F.
