First responders including police, firefighters and ambulance technicians worked quickly last night after a fire broke out at a seniors residence in Mirabel.
The first alarm sounded at around 11 p.m. at the Faubourg du Domaine, in Saint-Janvier.
About two dozen people were evacuated from the building.
One person is in hospital in serious condition.
The fire is believed to have started in a third floor apartment but the cause is unknown.