Heat dome will blanket much of the US, with worrisome temperatures in Midwest

Wyatt Seymore pours the last drops of liquid from a water bottle into his mouth as he takes a break from unloading a stiflingly hot trailer of fireworks outside Powder Monkey Fireworks ahead of the opening of the stand, June 17, 2024, in Weldon Spring, Mo. (AP Photo/Jeff Roberson, File)

Summer will make a dramatic entrance in the U.S. this week with a heat dome that will bring stifling temperatures and uncomfortable humidity to millions.

The heat will be particularly worrisome this weekend across wide stretches of Nebraska, Illinois, Wisconsin and Iowa, where forecasters are warning of extreme temperature impacts.

This will be the first stretch of true summertime weather for many from Midwest to the East Coast, said Tom Kines, a meteorologist at the private weather company AccuWeather.