THE GUARDIAN — WORLD·JULY 15, 2026
Wildfires in Ontario make Toronto air quality worst in world
VERIFIED FACTS
- 01Environment Canada issued health warnings on Wednesday after air quality in Toronto was ranked the worst in the world by IQAir due to smoke from over 100 active wildfires in northern Ontario.
- 02Toronto recorded a temperature of 37.3C in the downtown core, shattering a three-decade heat record, while runway temperatures at its main international airport reached 55C.
- 03Canadian National Railway confirmed that a train crew near Armstrong, Ontario, was safely evacuated after flames approached the tracks.
- 04Mandatory evacuations were ordered for residents of the Namaygoosisagun First Nation community in Collins, Ontario, who fled across Collins Lake with minutes of warning.
- 05Nadya Kwandibens, a photographer, posted on social media that her family's hometown of Collins, Ontario, was gone, and Lise Vaugeois confirmed the community burned to the ground.
- 06Sol Mamakwa, a member of Ontario's New Democratic party, stated that an entire First Nation community had been erased due to the disaster.
- 07CNN reported that air quality alerts were issued across Michigan, Minnesota, and Wisconsin, with forecasts indicating thicker smoke would move over New York, Washington, and other eastern cities later in the week.
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SUMMARY
Smoke from over 100 wildfires in northern Ontario caused Toronto to rank as the city with the world's worst air quality, prompting Environment Canada to issue health warnings and record-breaking heat conditions. The fires forced the mandatory evacuation and eventual destruction of the Collins community in the Namaygoosisagun First Nation, with railway crews also safely evacuated. Air quality alerts have spread to multiple U.S. states as smoke plumes continue to move eastward.