A smog warning was issued Thursday in several regions of southern Quebec. To reduce air pollution during the winter, Environment Canada recommends limiting the use of fireplaces and wood stoves. Explanations.
Posted at 3:25 p.m.
Which regions are affected by the smog warning?
High concentrations of pollutants were detected from Salaberry-de-Valleyfield, in Montérégie, to south of La Tuque, in Mauricie. The Montreal metropolitan region is also affected by the warning. According to Environment Canada, air quality will remain poor at least until Friday morning.
Is smog in winter rare?
No. Although it may come as a surprise, an episode of smog during the cold season is not exceptional. In February 2005, Montreal experienced a 9-day smog episode, the longest in Quebec history. A few years later, the metropolis recorded another record: 47 days of smog warnings during a single winter! At this time of year, wood heating is the main source of pollutants that contribute to smog.
Are wood stoves to blame?
Most likely. To reduce air pollution, Environment Canada recommends limiting the use of fireplaces and wood stoves, which generate more fine particles than transportation. The federal agency also advises reducing your speed if you have to take your car and not letting the engine idle.
Do weather conditions also impact smog?
Yes. Pollutants accumulate more easily in the air in the absence of wind, as is the case this Thursday. “There was also fog [jeudi] morning, which did not help disperse the pollutants,” adds Katarina Radovanovic, meteorologist at Environment Canada. To completely chase away the smog, we will have to wait for the current system to give way to strong winds or precipitation.
What are the health risks?
Smog mainly affects young children, the elderly and people with respiratory or heart diseases. Breathing polluted air can irritate the airways, cause inflammation and worsen asthma. “There are people who can continue to do their activities, while for others it would be better to reduce them. It’s up to everyone to see how to adjust,” advises M.me Radovanovic.
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