Update 6:00 p.m.:
The two right lanes of I-495 Southbound have been reopened to traffic in Littleton near Exit 31, according to Twitter reports from the Massachusetts Department of Transportation.
All lanes had been closed for nearly an hour between Exit 31 and 32 at the Route 119 connection.
Posted at 5:40 p.m. on July 29:
Southbound lanes of I-495 have been temporarily closed by Massachusetts State Police and the Westford Fire Department while they continue to clean up from a seven-car crash and a second crash that followed, according to Twitter reports.
Two medical transports have been reported, according to "@tyngemergencyblog" on Twitter. One transport came from the seven-car accident, and the other from the second accident that is said to have followed.
The crashes happened during a brief downpour Monday afternoon.
A seven-car crash happened just after Boston Road near Exit 32 on the Littleton/Westford line, according to Twitter reports. One vehicle caught fire.
Another crash happened a quarter-mile down the highway, according to tweets from "@NEFireBuff, who also tweeted that companies responding were reporting "gridlock" conditions.
"The only thing missing out of the #Westford crash is a #FungWah bus," @NEFirebuff commented on Twitter.
Westford Patch is waiting to hear from State Police for confirmation and updates.
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