Temperatures will climb toward 100 degrees on Tuesday, according to National Weather Service forecasters, potentially smashing the old record for the day, 98.
And the heat will continue at least through Wednesday, the forecasters said.
“It’s going to be a hot and muggy week for sure,” said weather service meteorologist Alan Dunham.
He said much of the region is already experiencing a heat wave, which consists of three or more consecutive days with temperatures over 90 degrees, but that there is a good shot at a six-day heat wave this week, ending Thursday.
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Boston missed its chance for a fourth day of temperatures of 90 or more today when the temperature only rose to 87 this afternoon. But the heat will be back with a vengeance Tuesday, with mostly sunny skies and uncomfortable humidity.
Boston Mayor Thomas M. Menino issued a heat advisory reminding residents to stay hydrated and in shaded or air conditioned areas whenever possible. He noted that spray parks are available as well as air-conditioned community centers.
Officials also advised people to wear sunscreen, loose, light-colored clothing and rest often in cool, shady areas. They also suggested taking cool showers or baths and avoiding cooking.
The forecast for Wednesday shows temperatures in the 90s in some areas and a chance of showers and thunderstorms starting in the late morning. Despite lower temperatures, Dunham said Wednesday will feel more oppressive because of high humidity.
Dunham said a “refreshing change of air masses” late Wednesday will trade the high heat and humidity for milder weather. There could be some lingering showers on the Cape and islands and South Shore Thursday morning, but the rest of the week will bring lower temperatures in the mid- to low 80s and lots of sun.
“Thursday, Friday, Saturday look absolutely gorgeous,” Dunham said.