Toronto choked by wildfire smoke, records world's worst air quality
Last updated: 23 minutes ago Despite the poor conditions, some residents continued to spend time outdoors, while others wore face masks as the smoke drifted across the city.
Howard Shapiro, Toronto's Associate Medical Officer of Health, compared exposure to the smoke to passive smoking, warning that the fine particles contain a mixture of harmful chemicals capable of affecting anyone, regardless of age or underlying health.
The smoke originated from 148 active wildfires burning across northwestern Ontario, where firefighters continue to battle multiple large blazes.
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