Boston firefighters battle 4-alarm blaze in Dorchester, 35 residents displaced and one firefighter injured

Boston firefighters knocked down a heavy fire in Dorchester Monday afternoon, as the rear porches of a multi-family home collapsed.

Nearly three dozen residents were displaced by the fire, and one firefighter suffered minor injuries.

The Boston Fire Department responded to the heavy blaze in the rear of 37 Holiday St., before 4 p.m. on Labor Day.

The fire reportedly extended to the building next door and in the rear, and a fourth alarm was ordered for the heavy fire.

“The rear porches of 37 Holiday St. have collapsed, all companies are working,” Boston Fire tweeted.

After 4 p.m., the fire department reported that the heavy fire had been knocked down on all three of the buildings.

Overall, 35 residents, three dogs and one cat were displaced after the fire.

“⁦@RedCrossMA, ⁦@Boston_CEC help find housing,” Boston Fire tweeted. “The cause is still under investigation.”