It’s been 90-plus degrees in Boston the last 5 out of 7 days

Spectators grabbed a nap in the shade before the start of the Boston Pops Fireworks Spectacular on Wednesday. Erin Clark for the Boston Globe

The end is near. But you still have about 24 hours of uncomfortably hot, humid weather to endure before the weather breaks.

Heat advisories are in place for Greater Boston and the rest of the state, except for the far western and southeastern regions, the weather service said. Some areas in interior Massachusetts may see showers, but they won’t cool much down.

“Man it’s a hot one,’’ forecasters wrote on social media Thursday. “Another day of hot and humid conditions. . . . Remember to beat the heat.”

The heat index predicted for Boston is 99 degrees. But the hottest pocket will be in the Connecticut River valley, with triple-digit heat indexes expected in Greenfield, Amherst, and Springfield, where it is expected to feel like 102 degrees.

The heat index is a measure that combines heat and humidity to show how unpleasant hot and humid weather feels.

“Expecting another round of upper 80s to mid 90s inland, particularly in the typically warmer spots of the [Connecticut] and Merrimack valleys,’’ forecasters wrote Thursday. Humidity levels will be high with dew points in the 70s, forecasters wrote.

Shortly before noon, the actual temperature at Boston Logan International Airport had reached 91 degrees. That made it the fifth day out of seven that the temperature had reached 90 or more in Boston, including Tuesday, when it reached 98.

Boston, like other coastal communities, sometimes benefits from a sea breeze. Inland communities are not so lucky. In Lawrence, for example, where the mercury had reached 92 by noon, Thursday was the seventh day in a row the temperature had climbed higher than 90.

The changeover Friday, which will be heralded by thunderstorms rolling from west to east across the state, will bring a much-needed relief to a stifling region. The high temperatures will drop into the low to mid-80s, and the humidity will be much more comfortable. Nights will turn comfortable again.

“A break in the heat,’’ forecasters wrote. “Expect very comfortable dewpoints. . . . Temperatures overnight will radiate out dropping overnight lows into the 50s.”