WEATHERWEATHERAdd TopicThe nation endures a sweltering heat waveFive year old Isaac Howard plays in a water feature during a visit with his family to the splash pad at Elver Park in Madison, Wis., July 21, 2016. The high pressure system, sometimes called a "heat dome," will push conditions to their hottest point so far this summer, though record hot temperatures are not expected, according to the National Weather Service.John Hart, APMembers of Legends Drum and Bugle cadets of Kalmazoo, Mich., go shirtless as they work on their routine during the heat of the day at Johnstown High School Trojan Stadium in Johnstown, Pa., July 21, 1016.Todd Berkey, APWith the temperature in the mid 90's, Carliya Dove soaks up the full effects of the play fountain in Julius Guinyard Park in Jacksonville, Fla., July 20, 2016.Bob Mack, APJim Darnell waits in the shade as a co-worker cuts another piece of siding for a home improvement job in Quincy, Ill. July 21, 2016.Michael Kipley, APLightning streaks across the sky over the marina in Port Washington, Wis. July, 21, 2016.Jeffrey Phelps, APHank, a quarter horse from Paris, Ill., stays close to a fan keeping cool inside a barn at the Illinois State Fair grounds July 21, 2016, in Springfield, Ill.Seth Perlman, APPatti Glessner relaxes on her raft at Keen Lake in Canaan Township, Pa. July 21, 2016.Butch Comegys, APA lifeguard overseas a platform of people as they try to beat the oppressive heat and humidity at Lake Harriet in Minneapolis, July 21, 2016.Jim Mone, APA youngster cools off at the Alaskan Adventure splash pad at the Henry Doorly Zoo in Omaha, Neb., July 21, 2016.Nati Harnik, APA double rainbow appears at sunset in Saukville, Wis. July, 21, 2016.Jeffrey Phelps, APChildren play in a water fall at the Crown Fountain in Chicago's Millennium Park, July 21, 2016.Charles Rex Arbogast, APThe sun sets beyond visitors to Liberty Memorial in Kansas City, Mo. July 21, 2016.Charlie Riedel, APFeatured Weekly Ad