Update, Tuesday a.m.: The MBTA rolled out shuttle buses to replace Ashmont Red Line service after the water disrupted power to the trains.
A National Grid crew working in the street at Dorchester Avenue at Ashmont Street in Dorchester around 6 p.m., struck a Boston Water and Sewer Commission main, turning Peabody Square into an impassible lake and forcing firefighters to evacuate at least one building after they started smelling a strong odor of gas. Read more.