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Hundreds of passengers aboard the Blue Line were evacuated Tuesday afternoon after a train became stuck beneath the Boston Harbor, between the Maverick and Aquarium stations, officials said.
Over the course of about an hour, Boston firefighters assisted with the evacuation of 500 people from the disabled train, the department said.
It took firefighters approx. 1 hr to evacuate 500 people from a @MBTA Blue Line train that was disabled under the harbor between Maverick & Aquarium station. They used the Nolan cart to transport anyone needing assistance using 3 exits , 2 in Boston & 1 in East Boston pic.twitter.com/8fYoSYLJHJ
— Boston Fire Dept. (@BostonFire) July 15, 2025
The MBTA said a downed communication wire was reported in the tunnel between Aquarium and Maverick.
The MBTA initially posted on social media around 2:30 p.m. that passengers should expect delays of about 20 minutes because of a signal problem at Aquarium. A short time later, the transportation agency said service between Bowdoin and the airport was “standing by” due to the signal problem, urging riders to use the Silver Line or the East Boston ferry instead.
By 3 p.m., the MBTA announced that shuttle buses were replacing service between the Government Center and Airport stations, noting that the buses would not stop at Bowdoin.
Just past 4 p.m, the MBTA said that shuttle buses were continuing to replace rail service, with fare free service also being offered on the Silver Line and the East Boston Ferry.
Blue Line Update: Shuttle buses continue to replace service between Government Center & Airport. Shuttle buses will not service Bowdoin.
— MBTA (@MBTA) July 15, 2025
Fare-Free alternative service options:
SL3 Bus between Airport & South Station
East Boston Ferry between Aquarium & Maverick. https://t.co/wz0rQo7Juk
“The MBTA apologizes for this disruption in Blue Line service,” an MBTA spokesperson said in a statement around 6:30 p.m. “Personnel are on site now, working to resolve the issue as quickly and safely as possible.”
The MBTA said 465 riders were escorted off the stuck train, which remained in the tunnel until into Tuesday evening. The cause of the incident is under investigation and no injuries were reported.
The MBTA announced around 8:30 p.m. that regular service on the Blue Line resumed with “residual delays of about 10 minutes.”
Blue Line Update: Regular service has resumed with residual delays of about 10 minutes due to an earlier signal problem at Aquarium. https://t.co/TUUMFslwbx
— MBTA (@MBTA) July 16, 2025
Dialynn Dwyer is a reporter and editor at Boston.com, covering breaking and local news across Boston and New England.
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