A flash flood warning is in effect until 9 a.m. for Boston and several communities south of the city, including Brockton, Quincy, and Randolph, officials said Thursday morning. The National Weather Service also issued a flood watch that will remain in effect until 4 p.m. for Rhode Island and eastern portions of Massachusetts and Connecticut.

Boston faces heavy rain and flash flood warnings with a forecast of showers, thunderstorms, and cooler temperatures.

While there is a slight chance of precipitation on Thursday evening, Pederson said, Friday’s holiday activities should occur under a clear sky with a high in the low to middle 80s. The dewpoint that day, Pederson said, should be “comfortable” at about 55 degrees.

There's a heat advisory in Massachusetts and remnants from Chantal could influence storms on Tuesday around Boston.

Boston experiences rainfall, thunderstorms, and fog; high near 74°F today, with chances of showers continuing into the night.

WE HAD ANOTHER HEAT WAVE YESTERDAY GETTING INTO THE LOW 90S. NOT HAPPENING TODAY. WE’RE STARTING OUT IN THE 60S IN WORCESTER AND IN BOSTON RIGHT NOW. BUT YOU CAN SEE THE AREAS OF FOG AND LOW CLOUDS. AFTER ALL THAT RAIN,

Slow moving thunderstorms and downpours will be around through the overnight. While the threat for localized flooding exists, the storms will not be widespread. Lightning is always dangerous, so make sure you are inside if you are hearing thunder.

Boston's weather clears up post-flooding, with sunny skies and highs in the low 80s expected, and a warm week ahead.