UPDATE (6:23 a.m. on July 26, 2026): It’s already 80 degrees in the 6 a.m. hour on Sunday morning with the sun low in the eastern sky yet. An extreme heat warning now applies to the entire region, Sanborn and other counties to the north included. It is in effect for an extra hour compared to when initially issued, as well. It will last until 9 p.m. Sunday.
UPDATE (1:18 p.m. on July 25, 2026): At 1:10 p.m. on Saturday, the National Weather Service added Aurora, Davison, and Hanson Counties to the extreme heat warning. It will be in effect until 8 p.m. on Sunday.
UPDATE (12:40 p.m. on July 25, 2026): The National Weather Service has extended the heat advisory for Davis and Hanson Counties, while adding an extreme heat warning for spots south of Mitchell.
The NWS Sioux Falls office had originally issued a heat advisory for the area until 8 p.m. on Saturday. That alert has been pushed out to 8 p.m. on Sunday and affects Aurora, Beadle, Davison, Hanson, Jerauld, McCook, Miner, and Sanborn Counties. Heat indices could soar to as much as 105 degrees.
An extreme heat warning goes until 8 p.m. Sunday for Bon Homme, Charles Mix, Douglas, and Hutchinson Counties. Heat index values are expected to reach as much as 109 degrees where the warning is in effect. Officials warn that heat related illnesses surge significantly when extreme heat mixes with high humidity.
MITCHELL, SD (Mitchell Now) — A heat advisory has been issued for all of southeastern South Dakota on Saturday.
The National Weather Service Sioux Falls office has listed the alert for noon to 8 p.m. due to expected temperatures around 100 degrees with high humidity. The conditions could lead to heat index values as high as 102 degrees.
Anyone spending time outdoors, like at Mitchell’s Arts in the Park, is encouraged to drink plenty of fluids and take precautions. Lightweight and loose-fitting clothing is the best possible wardrobe. Strenuous activities should be moved to early morning or evening hours. The last piece of advice is to be extra vigilant in looking out for signs of heat exhaustion or heat stroke.
If driving about, make sure to check the back seat of the vehicle when getting out. It takes 10 minutes for the inside of a cabin to reach lethal temperatures when the sun is beating down on it and the air temperature is nearly triple digits. Any child left inside will quickly be in extreme danger. Pets will also struggle in a car if left on their own.
