Extreme Heat Warning: Marathon; Shawano; Wood; Portage; Waupaca; Outagamie; Brown; Waushara; Winnebago; Calumet

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Extreme Heat Warning — Marathon; Shawano; Wood; Portage; Waupaca; Outagamie; Brown; Waushara; Winnebago; Calumet Severity: Severe. Certainty: Likely. * WHAT...Dangerously hot conditions with heat index values up to 109 expected both Monday and Tuesday afternoon. Overnight heat indices will remain around 75 degrees, which will still be hazardous for anyone without shelter after the extreme heat in the afternoon. * WHERE...Marathon, Portage, Waushara, Wood, Calumet, Winnebago, Brown, Outagamie, Shawano, and Waupaca Counties. * WHEN...From noon today to 7 PM CDT Tuesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.