Dangerous Heat To Scorch MA: When It May Hit 102 Degrees

MASSACHUSETTS — An extreme heat warning is in effect across most Massachusetts through Tuesday night with temperatures expected to top 100 degrees for the first time in June in four years.

The National Weather Service said the "dangerously hot conditions" will include a heat index value of up to 110 degrees. The NWS issued the Extreme Heat Warning through Tuesday at 8 p.m.

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"Heat-related illnesses increase significantly during extreme heat and high humidity events," the NWS said. "Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun and check on relatives and neighbors."

The warning is in effect for all of Massachusetts except for Cape Cod and the Berkshires.

The peak of the heat will be on Tuesday after a very warm Monday with highs in the low 90s inland and 80s right along the coast because of a sea breeze. The feels-like temperature will be near 100 degrees inland.

Temperatures will hover in the 70s with high humidity overnight into Tuesday, when a searing stream of hot air will funnel into New England. The NWS is calling for a high temperature of 102 degrees with a heat index of 109.

The last time Boston hit 100 degrees in June was 2021. Boston's all-time high temperature is 104 degrees.

Temperatures will stay near 80 degrees overnight Tuesday, before it is slightly less oppressive on Wednesday. The high temperature on Wednesday will be about 90 degrees with a chance of a shower or thunderstorm in the afternoon.

It will then turn much cooler for the end of the week with a high of 72 degrees on Thursday and a high of 71 on Friday.

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(Scott Souza is a Patch field editor covering Beverly, Danvers, Marblehead, Peabody, Salem and Swampscott. He can be reached at Scott.Souza@Patch.com. X/Twitter: @Scott_Souza.)