⚠️ Extreme Heat Warning – Marathon; Shawano; Wood; Portage; Waupaca; Outagamie; Brown; Waushara; Winnebago; Calumet – Tuesday, June 30, 2026

Extreme Heat Warning issued June 30 at 2:14PM CDT until June 30 at 7:00PM CDT by NWS Green Bay WI

Details

* WHAT…Dangerously hot conditions with heat index values up to 105.
Heat index values over central WI will reach 95 to around 100.

* WHERE…Marathon, Portage, Waushara, Wood, Calumet, Winnebago,
Brown, Outagamie, Shawano, and Waupaca Counties.

* WHEN…Until 7 PM CDT this evening.

* IMPACTS…Heat related illnesses increase significantly during
extreme heat and high humidity events.

Instructions

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

This alert was automatically posted by SkyGuard, MWSC’s severe weather alerting system. Source: National Weather Service.