Weather Alerts For Ottawa, IA

# HEADLINE -------------------- EXTREME HEAT WARNING REMAINS IN EFFECT FROM NOON TO 9 PM CDT SUNDAY EXTREME HEAT WATCH REMAINS IN EFFECT FROM SUNDAY EVENING THROUGH MONDAY EVENING # DETAILS -------------------- WHAT For the Extreme Heat Warning, dangerously hot conditions with heat index values near or exceeding 110 expected. For the Extreme Heat Watch, dangerously hot conditions with heat index values up to 110 possible. WHERE Portions of central, north central, northeast, south central, and southeast Iowa. WHEN For the Extreme Heat Warning, from noon to 9 PM CDT Sunday. For the Extreme Heat Watch, from Sunday evening through Monday evening. IMPACTS Heat related illnesses increase significantly during extreme heat and high humidity events. ISSUED AT Saturday, July 25, 2026 at 3:37 PM CDT ISSUED BY National Weather Service Des Moines IA 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. # AREAS AFFECTED -------------------- Appanoose, Marion, Black Hawk, Bremer, Butler, Clarke, Davis, Decatur, Grundy, Jasper, Lucas, Mahaska, Marshall, Monroe, Poweshiek, Tama, Wapello, Wayne Including the cities of Aplington, Marshalltown, Pella, Toledo, Greene, Conrad, Knoxville, Humeston, Waterloo, Grinnell, Bloomfield, Leon, Corydon, Allerton, Albia, Chariton, Oskaloosa, Grundy Center, Dysart, Tama, Newton, Dumont, Lamoni, Wellsburg, Ottumwa, Reinbeck, Gladbrook, Clarksville, Traer, Centerville, Cedar Falls, Shell Rock, Parkersburg, Allison, Dike, Osceola, Waverly, and Seymour

# HEADLINE -------------------- EXTREME HEAT WARNING REMAINS IN EFFECT FROM NOON TO 9 PM CDT SUNDAY EXTREME HEAT WATCH REMAINS IN EFFECT FROM SUNDAY EVENING THROUGH MONDAY EVENING # DETAILS -------------------- WHAT For the Extreme Heat Warning, dangerously hot conditions with heat index values near or exceeding 110 expected. For the Extreme Heat Watch, dangerously hot conditions with heat index values up to 110 possible. WHERE Portions of central, north central, northeast, south central, and southeast Iowa. WHEN For the Extreme Heat Warning, from noon to 9 PM CDT Sunday. For the Extreme Heat Watch, from Sunday evening through Monday evening. IMPACTS Heat related illnesses increase significantly during extreme heat and high humidity events. ISSUED AT Saturday, July 25, 2026 at 3:37 PM CDT ISSUED BY National Weather Service Des Moines IA 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. # AREAS AFFECTED -------------------- Appanoose, Marion, Black Hawk, Bremer, Butler, Clarke, Davis, Decatur, Grundy, Jasper, Lucas, Mahaska, Marshall, Monroe, Poweshiek, Tama, Wapello, Wayne Including the cities of Aplington, Marshalltown, Pella, Toledo, Greene, Conrad, Knoxville, Humeston, Waterloo, Grinnell, Bloomfield, Leon, Corydon, Allerton, Albia, Chariton, Oskaloosa, Grundy Center, Dysart, Tama, Newton, Dumont, Lamoni, Wellsburg, Ottumwa, Reinbeck, Gladbrook, Clarksville, Traer, Centerville, Cedar Falls, Shell Rock, Parkersburg, Allison, Dike, Osceola, Waverly, and Seymour