Chicago, Illinois – The Chicago area is facing a range of weather concerns, starting with thunderstorms Thursday afternoon and followed by dangerously high heat Friday, with “feels like” temperatures nearing 100°F.
Additionally, an Air Quality Alert is in effect through midnight Thursday, with outdoor activity discouraged for sensitive groups.
Weather and Air Quality Alert Details
The National Weather Service has forecast scattered thunderstorms starting after 1 p.m. Thursday, potentially bringing gusty winds and heavy rain to the city and suburbs. However, the bigger concern will be the dangerous heat expected to build in on Friday and Saturday.
Heat indices will approach or exceed 100°F, particularly in southern Cook County, Joliet, and Naperville. South winds will keep humidity levels high, making outdoor activities risky for anyone without access to shade or air conditioning.
Additionally, the Illinois Environmental Protection Agency has issued an Air Quality Alert, urging residents—especially children, seniors, and individuals with asthma—to limit outdoor activity today due to elevated ozone and particle pollution levels.
Weather Impacts and Precautions
Storms: Thunderstorms could briefly disrupt the heat, but they may also cause localized flooding and power outages, particularly in areas with gusty winds over 40 mph. Tree limb damage is also possible.
Heat: Friday and Saturday will bring dangerous heat, with high humidity levels that make outdoor plans especially risky. Ensure you stay hydrated, take breaks in shaded areas, and use cooling centers if needed.
Air Quality: Sensitive groups should minimize outdoor activity today due to poor air quality. The alert is in effect until midnight, and thunderstorms may offer brief relief.
Extended Outlook
The National Weather Service and Illinois EPA have warned that conditions remain unsettled through the weekend, with more potential for storms and excessive heat. Be sure to stay updated on weather alerts and make plans for heat relief.
Five-Day Forecast for Chicago, Illinois:
Thursday: Chance of afternoon thunderstorms, high near 87°F.
Friday: Hot and humid, storms possible early, high near 90°F+, heat index near 100°F.
Saturday: Sunny with continued heat, slight storm risk late, high 91°F.
Sunday: Mostly sunny, chance of storms, high 88°F.
Monday: Cooler, chance of storms, high near 86°F.
