After a relatively comfortable July 4th, the extreme heat is returning to Massachusetts and the National Weather Service has issued a heat advisory because of how hot it will feel through Monday.The National Weather Service has issued a heat advisory for most of southern New England through Monday at 8 p.

There is a flood watch in effect from 10 a.m. until 10 p.m. Monday for Bucks, Chester, Delaware and Montgomery counties in PA and Camden, Cumberland, Gloucester, Hunterdon, Mercer and Middlesex

At 2:06 a.m. on Monday, the National Weather Service released a heat advisory valid for Tuesday between 10 a.m. and 8 p.m. for Hunterdon, Somerset, Middlesex, Monmouth and Mercer counties.