Metro

Thunderstorms roll across Mass.

Boston, MA., 08/11/16, Trying to keep cool in the fountains at the Rose Kennedy Greenway are twins Gabriel and Alesar Haroon, cq, who are three years old. Suzanne Kreiter\Globe staff
Suzanne Kreiter/Globe staff
Twins Gabriel and Alesar Haroon, 3, tried to keep cool in the fountains at the Rose Kennedy Greenway Thursday.

Scattered thunderstorms rambled through a sweltering Massachusetts Friday afternoon, prompting the National Weather Service to issue a slew of warnings.

The forecasters said strong winds, lightning, and heavy rain leading to flooding were possible. The agency fielded about a dozen reports of trees and wires down and flooding from around the state.

At 5:17 p.m., the weather service issued a severe thunderstorm warning for areas in Hampshire, Hampden, and Franklin counties, with winds gusting up to 60 miles per hour.

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At 5:18 p.m., the weather service issued the same warning for areas in Bristol County, as well as in nearby parts of Connecticut and Rhode Island.

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Meanwhile, much of the state was sweltering under intense heat. The weather service issued an excessive heat warning.

The temperature was 97 at Logan International Airport at 3 p.m., and the heat index was 104.

Showers and thunderstorms are expected to diminish as the evening progresses.

But high heat and humidity are expected to continue across the area through Sunday, forecasters said.

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While saying the forecast is tricky, the weather service said showers and thunderstorms could return on Saturday — and there is the possibility of a tornado.

“We have a good environment in place for brief, relatively weak tornadoes. ... This threat is low, but something to keep an eye on and be aware of,” forecasters said in a Web posting.

For those tired of the steam heat, forecasters did have some good news: Temperatures should drop below 90 on Monday through most of next week.

Mayor Walsh has declared a heat emergency in Boston through Saturday. Cooling centers will be open at the Boston Centers for Youth & Families.

John R. Ellement can be reached at ellement@globe.com. Follow him on Twitter @JREbosglobe.