The heat will break by the weekend. Interior New England may see 90° through the day on Friday, which means an eight day heat wave. Saturday and Sunday can’t get much nicer. Both days should feature sunshine, low humidity and temperatures around 80°.
Showers and thunderstorms are possible Thursday and Friday. It’s possible that one or two storms may turn severe on Friday. At this point, if severe thunderstorms develop, they would produce gusty winds and very heavy rain.
It’s likely that the heat and humidity will make a return next week. it most likely will not be as extreme as this past week, but it will be hot, possibly reaching 90°.