Ontario Wildfires Blanket Region in Smoke, Sparking Health Warnings in Canada and the U.S.

On July 17, 2026, many wildfires raged across Ontario — described as "Out of Control." Smoke traveled far south, covering Toronto. Environment Canada issued an orange-level air quality warning, meaning the air could be unhealthy to breathe. The New York Times reported Americans worried about the smoke too. Hot weather in southwestern Ontario made conditions worse.