A smog warning is in effect surrounding the city. Châteauguay and La Prairie area, Laval, Longueuil, as well as the whole Island of Montreal. to help improve the air quality Weather Alerts, Environment Canada ask you to limit the use of fireplaces and wood-burning stoves, use public transit, reducing our driving speed and not letting our car engines run for 20 minutes at a time just to warm up.
A smog warning can also affect those who suffer from asthma and people with respiratory ailments or heart disease. Until the smog warning has been lifted Weather Alerts, Environment Canada recommends that those who suffer from these conditions to reduce any intense physical activity outdoors.