For residents across the South and Midwest, 90-degree temperatures would be pretty cool. Compared to 100-plus.
The triple-digit heat wave is blamed for 37 deaths and may have caused 10 others.
A Tennessee medical examiner's office confirms that a 53-year-old man found in his apartment died from the heat, bringing the death toll in Memphis to eight.
There have been nine confirmed heat-related deaths in Missouri and eight in Illinois.
The Tennessee Valley Authority, the nation's largest public utility, has had to shut down one of three units at a nuclear power plant in Alabama. The river water used to cool the plant was too hot. Officials don't think that's ever happened before.
Forecasters expect temperatures to drop slightly this weekend in Memphis and other parts of the Mississippi Valley.