The heat is on for western states gripped in the nation's first heat dome of the year. And it's a scorcher, with temperatures reaching into the triple digits for major cities such as Las Vegas, ...

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 ...

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 ...