Toronto is currently experiencing extremely poor air quality due to dense smoke drifting from wildfires in northwestern Ontario. On Wednesday, July 15, 2026, the city's air quality was ranked the worst among major cities worldwide, according to IQAir, a Swiss air quality technology company. Environment Canada issued an orange-level air quality warning, advising residents to limit time spent outdoors.
The smoke has caused a visible haze, tinting the sky an eerie orange and obscuring city landmarks. This severe air quality is a direct result of the numerous wildfires burning in Ontario's northwest region, with over 100 active fires reported, many of which are not under control. Health risks associated with the smoke include eye, nose, and throat irritation, headaches, and in more severe cases, chest pains or a severe cough. Vulnerable populations, including seniors, pregnant individuals, young children, and those with pre-existing health conditions, are at a higher risk.
While a heat warning was also in effect for Toronto, it has since ended, but the smoky conditions are expected to persist. Environment Canada meteorologist Brian Owsiak suggested that the smoke may begin to clear by Friday morning as wind directions shift. Toronto Public Health has activated its wildfire smoke response strategy to address the situation. Many outdoor events and activities across the city have been cancelled or postponed due to the hazardous air quality and the lingering heat.
