A “heat dome” is set to impact millions this week in the eastern half of the U.S. this week. It’s forecast to last well into the July 4th weekend.
The dome will expand and intensify by-mid-week, and cities including Philadelphia, New York, Washington, DC and more could hit the triple-digits.
Meanwhile, the mega heat dome could spark tropical storm development near the southern U.S. in the Atlantic and the Gulf.