From Los Angeles to Boston -- dangerous heat will impact more than 100 million Americans this week.

Most of America's Lower 48 states are about to swelter under an unusually large, strong and long-lasting heat dome that will spike temperatures in a way that the National Weather

Most of the U.S. is about to swelter under an unusually large, strong and long-lasting heat dome. The heat wave is set to start this weekend and last at least a week.