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Severe Thunderstorms and Heat Wave Hit Chicago Area

Chicago, IL – August 16, 2025:
The National Weather Service (NWS) has issued multiple Severe Thunderstorm Warnings and a Flash Flood Warning across parts of Illinois and Indiana as storms continue to impact the region.

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Severe Thunderstorm Warnings in Effect

• Warnings are in place for Cook, DuPage, Kane, Kendall, Lake, McHenry, DeKalb, and Will counties until 7 p.m.

• Storms bring quarter-sized hail and winds up to 60 mph.

• Flash flooding was reported in Naperville, Downers Grove, and Woodridge earlier in the evening.

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Heat Index Reaches 100+ Degrees

• Temperatures soared into the 90s across much of Chicago.

• Heat indices reached 100–110 degrees, especially south of Interstate 80.

• NWS classified the region under an Elevated Excessive Heat Risk.

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What’s Next for Chicago Weather

• Sunday: Cooler air expected with highs in the low 80s.

• Monday: Another round of intense heat with chances of showers to start the week.

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