Heat advisory to extend through Monday night, National Weather Sevice says

NEW HAVEN — The current stretch of hot weather is expected to linger until Monday night, according to the National Weather Service.

Forecasters issued a heat advisory for Fairfield, New Haven, Middlesex and New London counties early Sunday morning, as well as portions of New York and New Jersey, to continue through 8 p.m. Monday.

The heat index — “a measure of how hot it really feels when relative humidity is factored in with the actual air temperature,” according to the National Weather Service — was expected to reach 102 degrees across much of the state on Monday, officials said.

Forecasters advised residents to seek air-conditioning, stay out of the sun, check up on relatives and neighbors and to reschedule strenuous outdoor activities to the early morning or evening.

Anyone overcome by the heat should be moved to a cool and shaded place, officials said, noting that heat stroke is a medical emergency.

The heat index was expected to reach into the upper 90s in New Haven county on Sunday, officials said. Significant humidity is likely, with winds of 10 to 15 miles per hour.

There is a chance of showers and thunderstorms in the evening, according to the service.

In Hartford, the head index may hit 101 on Sunday. Gusts up to 23 miles per hour are possible as well, and there is some chance of rain.

In Torrington, a high of 88 is expected on Sunday; in Bridgeport, a high near 90 and heat index values near 98 is in the offing.

On Monday, heat index values are forecast at 101 degrees, officials said. There is also a 20 percent chance of rain, officials said, with humidity expected again.

The forecast for the weekend comes on top of several days of hot and humid weather in Connecticut.

Earlier in the week, Gov. Ned Lamont announced he would activate the state’s extreme hot weather protocol, which allows state and local municipal officials to coordinate the opening of cooling centers for vulnerable populations.

william.lambert@hearstmediact.com