Millions in the U.S. prepare for more sweltering heat as floodwaters inundate parts of the Midwest

"It's more important for people who are going to be outside to stay hydrated, because heat, humidity and low winds, even if you're in good shape and not really acclimated to it, it could be a danger."

Millions of Americans prepared to sweat through yet another scorching day, with the potential for rolling storms later Sunday to bring relief from the sweltering heat for at least some. Floodwaters inundated parts of the Midwest, including a town in Iowa evacuated after being submerged up to the rooftops. Read More