Wisconsin Severe Extreme Heat Warning | Effective 06/28/2026 19:15

Headline: 
Extreme Heat Warning issued June 28 at 9:15PM CDT until June 30 at 7:00PM CDT by NWS Milwaukee/Sullivan WI
Event: 
Extreme Heat Warning
Urgency: 
Expected
Effective: 
June 28, 2026 - 7:15pm
Expires: 
June 29, 2026 - 3:15am
Description: 
* WHAT...Dangerously hot conditions with heat index values up to 108 expected. * WHERE...Portions of east central, south central, and southeast Wisconsin. * WHEN...From noon Monday to 7 PM CDT Tuesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.
Instruction: 
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. Stay cool, stay hydrated, stay informed.
Area Description: 
Marquette; Green Lake; Fond Du Lac; Sheboygan; Sauk; Columbia; Dodge; Washington; Ozaukee; Iowa; Dane; Jefferson; Waukesha; Milwaukee; Lafayette; Green; Rock; Walworth; Racine; Kenosha
Forcast Office: 
NWS Milwaukee/Sullivan WI