Extreme heat is returning to Massachusetts starting Monday and Boston could see its third heat wave of the summer this week. The WBZ Next Weather Team has issued a Next Weather Alert for the heat.A Heat Advisory goes into effect for most of Massachusetts on Monday at 11 a.

A heat advisory was issued by the National Weather Service on Monday at 5 a.m. valid from 11 a.m. until Wednesday 8 p.m. for Northern Worcester and Southern Worcester as well as Franklin, Middlesex, Essex,

A heat advisory is in effect in Norwich and a slew of other Connecticut communities this week. Here's what to expect.