Update, Wednesday, 6:20 a.m. The MBTA reports the D Line is back in service.
Grace Holley reports tonight from Brookline Hills, where a loud explosion shortly after 8:30 p.m. was followed by a torrential waterfall from a newly burst water main right above the tracks.
Normally I love water rides but this is a nightmare.
A second Green Line train approached waterfall but went into reverse and backed up, after a long wait.
Now police etc are on scene, lot of flooding on tracks. No more sparks. Right by Brookline Hills Station/Cypress St.