Weather Alerts For Yankton, SD

# HEADLINE -------------------- HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING # DETAILS -------------------- WHAT Heat index values 100 to 105 expected. WHERE Portions of northwest Iowa, northeast Nebraska, and southeast South Dakota. WHEN Until 9 PM CDT this evening. IMPACTS Hot temperatures and high humidity may cause heat illnesses. ISSUED AT Monday, June 29, 2026 at 5:55 AM CDT ISSUED BY National Weather Service Sioux Falls SD HEADER URGENT - WEATHER MESSAGE # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Monitor the latest forecasts and warnings for updates. # AREAS AFFECTED -------------------- Clay, Dickinson, Dixon, Lincoln, Lyon, Minnehaha, Osceola, Turner, Yankton Including the cities of Canton, George, Lennox, Ponca, Inwood, Centerville, Marion, Chancellor, Irene, Sioux Falls, Spirit Lake, Wakefield, Tea, Sibley, Rock Rapids, Harrisburg, Hurley, Viborg, Allen, Vermillion, Arnolds Park, Parker, Yankton, Larchwood, and Milford