Authorities were warning Montrealers not to be alarmed Thursday at the sound of loud sirens going off in different areas across Montreal.
The public alert exercise is intended to prepare for a major industrial accident and was carried out at nine different factories in the city.
The drill took place in factories as far east as Rivière-des-Prairies to as far west as Lachine. Suncor refineries in Montreal East and the Molson Coors brewery in the Ville-Marie borough were among the companies participating.
The tests, which were staggered throughout the afternoon and early evening, began as early as 4:30 p.m. in some areas. The latest drill took place at around 7 p.m. at Parmalat in Montreal West.
A full list of participating industrial companies and affected areas can be found online.
In the event of a real toxic leak, the city says people should quickly enter the nearest building. They should immediately close doors, windows and ventilation units.
Montrealers should also not head to their children’s schools or flood emergency phone lines if there is a major industrial accident.
A full list of instructions of what to do during such an incident can be found on the city’s website.