Milwaukee

Heat Advisory in Effect for Wisconsin as Temperatures Soar and Thunderstorms Loom on the Horizon

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Published on July 23, 2025
Heat Advisory in Effect for Wisconsin as Temperatures Soar and Thunderstorms Loom on the HorizonSource: Google Street View

Wisconsinites are bracing for a sizzling Wednesday as the National Weather Service (NWS) in Milwaukee reports high heat levels, prompting a Heat Advisory to remain in effect from 11 AM until 8 PM CDT. The National Weather Service cautions that heat index values are expected to reach between 100 to 105 degrees, affecting areas across east central, south central, and southeast Wisconsin. Residents are advised to "drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors."

The weather outlook also includes scattered thunderstorms which can potentially elevate to hazardous conditions. For today, these storms look set to break mostly west of a line from Janesville to Fond du Lac in the morning, with reduced likelihood eastward. Citizens should prepare to possibly again experience extreme heat tomorrow, with the NWS suggesting that another Heat Advisory "may be needed for southeast Wisconsin."

Beachgoers in Sheboygan County should take note of a Beach Hazards Statement effective from noon until 10 PM CDT due to a high risk of strong currents and dangerous swimming conditions. "Stay out of the water and away from dangerous areas like piers and breakwalls," warns the NWS. Ozaukee County isn't exempt from risk either, with moderate swim risk forecast and advisories against hazardous areas such as piers and breakwalls.

Looking ahead, the prospect of thunderstorms is on the horizon for tomorrow, with the peak threat period being in the afternoon. Beyond that, expect storm chances to extend from Friday into the early part of next week. The NWS also hints at additional heat-related concerns to potentially arise early next week, as summer's grip remains steadfast.

Residents are reminded that heat illnesses are a serious risk during such conditions, and early symptoms should be actively addressed. Thunderstorm and heat advisories underscore the need for vigilance throughout the week. According to the latest forecasts on NWS, the heat wave is expected to finally give way to more comfortable temperatures, with highs near 81 on Tuesday, though a chance of thunderstorms lingers.