TORONTO/NEW YORK ¨C Toronto¡¯s air quality ranked the worst among major cities globally on Wednesday as wildfire smoke from northwestern Ontario blackened skies and spread into the northeastern United States, prompting health warnings and calls for residents to limit outdoor activities.
Wildfires are raging through sparsely populated areas hundreds of miles from Toronto and ?sending smoke over a wide area, although they are not directly threatening cities.
Environment Canada reported an Air Quality Health Index reading of 10+, classified as ¡°very ?high ?risk,¡± for Toronto, while forecasts suggested hazardous conditions could persist through Thursday night.
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