The first days of summer will be hot throughout the northeast, with temperatures into the 90s.
The equatorial heat is expected to continue until Friday.
Mike Kistner of the national weather service says the highest temperatures of the year are expected from the middle atlantic states all the way to Maine.
"You get a nice ridge of high pressure in place where we get that nice southerly component, bringing us up that warm tropical air. It’s really not that out of the ordinary for this time of year."
Heat advisories are now in effect in 8 states. New York City has opened 450 cooling centers. Boston has set up sprinklers in city parks. New Hampshire officials are urging people to stay where it’s cool and take it easy.