Smoke and carbon monoxide from drenched manholes at Washington and Kneeland streets started filling some basement buildings around the intersection of Washington, Stuart and Kneeland streets around 9 a.m. Firefighters evacuated the HI Boston Hostel at 19 Stuart St. due to high carbon-monoxide readings.

Boston Fire has struck a second alarm to bring in additional firefighters to deal with the issue.

Silver Line SL5 buses are not stopping at Tufts Medical Center due to the flooding and fire trucks.

The city is opening a resource office for affected residents and business owners at Chinatown Main Streets, 2 Boylston St.

Photo from the scene.