Weather Alerts For Montello, WI

# HEADLINE -------------------- EXTREME HEAT WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH TUESDAY MORNING # DETAILS -------------------- WHAT Dangerously hot conditions with heat index values up to 105 degrees possible throughout the day Monday, with high humidity and continued heat index values above 75 degrees throughout the overnight hours into Tuesday morning. WHERE Portions of east central, south central, and southeast Wisconsin. WHEN From Monday afternoon through Tuesday morning. IMPACTS Heat related illnesses increase significantly during extreme heat and high humidity events. ISSUED AT Sunday, June 28, 2026 at 1:51 AM CDT ISSUED BY National Weather Service Milwaukee/Sullivan WI HEADER URGENT - WEATHER MESSAGE # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. # AREAS AFFECTED -------------------- Iowa, Kenosha, Columbia, Dane, Dodge, Fond du Lac, Green, Green Lake, Jefferson, Lafayette, Marquette, Racine, Rock, Sauk, Walworth, Washington, Waukesha Including the cities of Lake Wisconsin, Blanchardville, Montello, Barneveld, Oxford, Mineral Point, Beloit, Berlin, Kenosha, Watertown, Darlington, Dodgeville, Portage, Janesville, Elkhorn, Belmont, Madison, Germantown, Waukesha, Princeton, Hartford, Fond Du Lac, Shullsburg, Menomonee Falls, Neshkoro, Columbus, Westfield, Reedsburg, Argyle, Monroe, Muskego, Benton, Brookfield, Lake Geneva, New Berlin, Sauk City, Lodi, East Troy, Jefferson, Waupun, Beaver Dam, Brodhead, Racine, Prairie Du Sac, Markesan, Whitewater, Delavan, Baraboo, Fort Atkinson, Mayville, Endeavor, and West Bend