Heat Advisory

Heat Advisory For Sioux Falls
It's time to get out of the kitchen, because I can't stand the heat. Wednesday will be very hot and humid in Sioux Falls, and heat illnesses will be possible.
What Is Heat Index?
We heard a lot about 'Heat Index' in July, and probably will in August. So just exactly what is 'Heat Index'? The opposite of 'Wind Chill'? Um, no,