A powerful heat dome is expected to intensify over the central and eastern United States during the July 4 holiday, sending temperatures soaring across more than 30 states and forcing communities to c...

America’s 250th birthday also marks the final stretch of one of the most intense eastern US heat waves in years — one made worse by climate change — and it could fuel an added storm threat as the nati...

Early Friday afternoon, Freedom 250 announced that the Great American State Fair on the National Mall would temporarily close until 5 pm due to the heat.