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How Canadians Are Keeping Indoor Air Clean as Wildfire Smoke Blankets the Country
With air quality warnings in effect across parts of Ontario and the Prairies, health officials and experts are sharing practical steps for reducing smoke exposure at home, in the car and outdoors
Published: July 19, 2026
Wildfire smoke has once again pushed air quality to unhealthy levels in parts of Canada this summer, prompting public health agencies to remind residents that smoke can travel thousands of kilometres from the fire zone and affect areas far removed from any active blaze.
Experts recommend checking the Air Quality Health Index regularly and staying indoors as much as possible when readings climb into high-risk categories, since even short periods of exertion outdoors on smoky days can significantly increase exposure.
Inside the home, keeping windows and doors closed and running central air conditioning or a portable air purifier with a HEPA filter can help reduce the amount of fine particulate matter that infiltrates indoor spaces. Some guidance also suggests setting ceiling fans to draw air upward and using a car's recirculation setting rather than pulling in outside air while driving through smoky conditions.
For anyone who must go outside during heavy smoke, wearing a well-fitted N95 or KN95 respirator can meaningfully cut exposure to fine particulates, while people with asthma or other respiratory conditions are advised to keep rescue medications on hand and seek medical attention if symptoms such as chest tightness, wheezing or persistent coughing develop.
With wildfire seasons growing longer and smoke events becoming a near-annual occurrence in many parts of the country, public health officials say building simple habits, checking air quality before heading out, keeping a purifier or spare filters on hand, and knowing when to limit outdoor activity, can make the smokiest weeks of summer easier to manage.
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