7/15/26 - 100+ Ontario Forest Fires Made Toronto's Air Quality The Worst In The World Today, And It's 99F Downtown

Smoke from more than 100 active wildfires in northern Ontario have made Toronto’s air quality the current worst in the world and caused yellow, smoky air in cities across the north-east US.

Environment Canada issued health warnings on Wednesday after the sky over country’s largest city turned a sickly yellow and was ranked the worst in the world according to IQAir, the Swiss technology company that racks global air quality.

The city is also suffering a heatwave that shattered a three-decade record after reaching 37.3C in the downtown core, with runways at its main international airport hitting 55C. The wildfires burning across northwestern Ontario have prompted mandatory evacuations from a number of First Nations communities.

EDIT

https://www.theguardian.com/world/2026/jul/15/wildfires-in-ontario-make-toronto-canada-air-quality-worst-in-world