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.

BRAINTREE, Mass. — Drenching downpours quickly turned highways and streets in eastern Massachusetts into rivers, just as traffic started to build for the Thursday morning commute. A large part of Interstate 93 in the Milton-Quincy area was underwater before 7 a.m. as torrential rain moved through.

Significant rainfall caused flooding in yet another state as the National Weather Service issued a flash flood warning in Massachusetts Thursday.

The northbound and southbound lanes in one area of Interstate 93 reopened after they were shut down for less than an hour due to flooding caused by heavy rain on Thursday.

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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