Weather Alerts For Onondaga, MI

# HEADLINE -------------------- EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM EDT THURSDAY # DETAILS -------------------- WHAT Dangerously hot conditions with heat index values up to 105. WHERE Portions of central, south central, southwest, and west central Michigan. WHEN Until 8 PM EDT Thursday. IMPACTS Heat related illnesses increase significantly during extreme heat and high humidity events. ISSUED AT Tuesday, June 30, 2026 at 1:40 AM EDT ISSUED BY National Weather Service Grand Rapids MI 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. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. # AREAS AFFECTED -------------------- Ingham, Montcalm, Allegan, Barry, Calhoun, Clare, Clinton, Eaton, Gratiot, Ionia, Isabella, Jackson, Kalamazoo, Kent, Lake, Mason, Mecosta, Muskegon, Newaygo, Oceana, Osceola, Ottawa, Van Buren Including the cities of Alma, Battle Creek, Hart, Reed City, St. Johns, Kalamazoo, Baldwin, South Haven, Muskegon, Clare, Hastings, Fremont, Ludington, Lansing, Charlotte, Grand Rapids, Big Rapids, Mount Pleasant, Ionia, Jackson, Greenville, Grand Haven, Holland, and Jenison