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.
Video from the scene initially showed drivers slowly navigating the rising floodwaters.
However, the flooding worsened as the morning progressed, with multiple vehicles left stranded in the middle of the highway…