Weather Alerts For Savanna, IL

# HEADLINE -------------------- EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 10 PM CDT WEDNESDAY # DETAILS -------------------- WHAT Dangerously hot and humid conditions with multiple days of heat index values of 100 to 110 expected, along with nighttime lows not falling below the mid to upper 70s. WHERE In Illinois, Carroll, Jo Daviess, and Stephenson Counties. In Iowa, Benton, Jackson, Jones, Linn, Buchanan, Delaware, and Dubuque Counties. WHEN Until 10 PM CDT Wednesday. IMPACTS Heat related illnesses increase significantly during extreme heat and high humidity events. ISSUED AT Tuesday, June 30, 2026 at 2:17 PM CDT ISSUED BY National Weather Service Quad Cities IA IL 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 -------------------- Stephenson, Benton, Buchanan, Carroll, Delaware, Dubuque, Jackson, Jo Daviess, Jones, Linn Including the cities of Freeport, Maquoketa, Vinton, Independence, Mount Carroll, Dubuque, Manchester, Cedar Rapids, Galena, and Anamosa