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.

Thunderstorms caused considerable flooding in the Boston metro area Thursday, with several cars left stranded in the middle of a highway.

The National Weather Service urged drivers to “turn around, don’t drown when encountering flooded roads” as flash flooding fueled by overnight rains crippled the Thursday morning

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