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Forecast calls for steamy Wednesday and Thursday, a break on Friday

Tomorrow marks the first official day of summer, and it’s going to feel like it.

Today Boston will be in the mid-70s and mostly sunny. Temperatures will reach the low 80s in the western part of the state.

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But the mild weather is leaving with the spring. Intense heat and humidity will hit Massachusetts Wednesday and Thursday. Temperatures will be in the high 90s both days, National Weather Service meteorologist Bill Simpson said.

The heat will be felt across the state. “This is probably going to be pretty universal,” Simpson said.

Wednesday will bring some cloud cover, but Thursday’s skies will be clear.

The record high for June 20 is 98 degrees and was set in 1953 according to the weather service. “It’s going to get pretty close ,” Simpson said.

The record high for June 21 is 95 and was set in 1949. He said Thursday’s number will probably break that record.

But even if records aren’t shattered, hot temperatures combined with heavy humidity will make it feel like the low 100s, he said.

The normal temperature for this time of the year is around 78 degrees, according to the weather service.

A heat wave consists of three or more consecutive days above 90 degrees, but the state probably won’t catch that wave. Friday will likely be milder.

“Even though it will be pretty hot, it won’t be an official heat wave,” Simpson said.

The weekend will bring near normal temperatures, but also chance of rain.

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