The excessive heat warning, issued Wednesday by the National Weather Service office in Des Moines, will continue until 7 p.m. Saturday, with very hot and humid conditions persisting over much of Iowa.
The combination of high heat and humidity will result in heat index values of 105°F to 115°F Saturday afternoon.
Widespread rain is expected late Saturday night into Sunday morning, with amounts commonly more than one inch and in isolated areas exceeding three inches.
Heat-related illnesses may occur due to the prolonged period of heat and humidity. The combination of hot temperatures and high humidity will combine to create a dangerous situation in which heat illnesses are possible.
Iowans are advised to drink plenty of fluids, stay in an air-conditioned room, stay out of the sun and check up on the welfare of relatives and neighbors.
ThePerryNews.com will update this weather story as forecasts evolve.