Toronto’s air quality ranked among the poorest in the world Monday as wildfire smoke from Quebec settled across the city during the start of a multi-day heatwave.
Toronto recorded an air quality index reading of 86 on IQAir, placing the city 19th among major cities worldwide as of 8 a.m. Its position later shifted to 30th as global air-quality conditions changed throughout the morning.
Within the Americas, Toronto briefly recorded the worst air quality in the Western Hemisphere.
Wildfire Smoke Creates Hazy Conditions Across Toronto
Wildfires burning in Quebec have sent smoke into parts of Ontario since the weekend, creating widespread haze across Toronto.
Environment Canada listed Toronto’s Air Quality Health Index at Level 5, representing a moderate health risk. Similar air-quality conditions were expected Tuesday.
Although pollution levels remained below those recorded during severe wildfire smoke events in previous years, the combination of smoke and extreme heat raised concerns about increased health risks.
Health Effects and Safety Guidance
The City of Toronto says exposure to wildfire smoke and poor air quality can cause eye and throat irritation, coughing, headaches, breathing difficulties and chest pain.
Residents are advised to reduce strenuous outdoor activity during periods of heavy smoke, particularly when symptoms develop. Keeping windows closed and using an indoor air filter may also help limit exposure to air pollution.
Air-quality rankings change throughout the day as pollution levels shift across major cities. Residents should continue monitoring local air-quality forecasts as smoke and elevated temperatures remain in the region.
