Six families were evacuated from their homes after a four-alarm fire tore through a residential building in the Chomedey district of Laval.
The six-unit building on Frégault Street reportedly caught fire at around 4:30 a.m. Wednesday.
As a precaution, neighbouring buildings were also evacuated.
One resident was transported to hospital to be treated for smoke inhalation.
An investigation has been opened to determine the cause of the fire.
Residents say they saw the fire start from an air-conditioning unit at the back of the building.
The STL offered temporary shelter on one of its buses to evacuated residents.
The 40 firefighters responding to the early morning blaze were able to control the fire. One firefighter was treated for heatstroke.
Crews are now dismantling the left section of the roof, which was damaged the most in the blaze.