Nearly three dozen people are without a home after a massive fire on Alden Street in Stamford Monday night.

Officials say the fire broke out just after 5 p.m. Monday. It spread to two multifamily homes and damaged a third.

A dozen fire crews were on the scene for hours putting out the fire. Officials say several firefighters and a few residents were treated for heat-related injuries, but are expected to be OK.

Marvin Siana and his family were on the first floor of the building during the fire. They were able to run to safety before he went back in to rescue his neighbors from the floor above. Siana and many others, some who were at work at the time, were not able to save their belongings.

The Red Cross helped aid families without a place to go Tuesday night, while some others planned to stay with family or friends.

The cause of the fire remains under investigation.