🥵BOILING POINT: The core of a life-threatening heat dome has shifted over the eastern U.S. through the July 4 holiday weekend. Dozens of cities could see one of their top five hottest days on record Thursday and Friday, with feels like temperatures expected to reach 110 degrees. Latest: #heatwave #hotweather #summer #fourthofjuly #july4th #nyc #philadelphia #washingtondc #boston