Relief from the heat and a potential for rain are forecast for the weekend.
But not until the arriving cold front takes hold. That means temperatures today are likely to be in the mid-90s and the heat index around 100 degrees, said Josh Boustead, meteorologist with the National Weather Service.
Cooler weather, with highs in the upper 80s, is forecast for Saturday and Sunday.
That cool weather is good news for the 10,000-plus cyclists who will be camped around Council Bluffs' Mid-America Center on Saturday night for Sunday's start of RAGBRAI, the Register's Annual Great Bicycle Ride Across Iowa. Last year, riders suffered through successive days of 100-plus degree heat.
Not so good for the cyclists this year — or athletes competing in Sunday's Omaha Triathlon at Cunningham Lake — is the potential for rain.
Boustead said Saturday night into Sunday brings the best chance of rain in a while. The odds were pegged at 50-50 in Thursday's forecast. The rain could be accompanied by storms.