A dangerous heat dome — a high-pressure system that traps hot air — is forming over the mid-Atlantic and is expected to intensify through next week, bringing Baltimore its hottest stretch of the year, ...

Many cities that have not seen actual 100-degree temperatures so far this summer will hit the mark this week. The Northeast is getting a brief reprieve before the big heat and humidity roll in later ...

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 ...