Toronto Experiences Poor Air Quality as Wildfire Smoke Travels Across Regions

Toronto, Canada’s largest city, experienced severe air quality issues on Wednesday. Wildfires in Ontario sent thick smoke toward the U.S. Northeast, causing health warnings. Residents woke up to an orange sky and the unmistakable smell of wood smoke. Environment Canada issued warnings about outdoor activity due to poor air quality.

Evacuations took place in several communities. Around Thunder Bay, Ontario, six rural and First Nations communities relocated due to the fires. Namaygoosisagagun First Nation residents, numbering around 40, evacuated by boat. Sol Mamakwa, an Indigenous provincial parliament member, addressed the gravity of the situation by emphasizing the community’s total displacement.

The flames posed risks to transportation as well. The Ontario Provincial Police reported threats to trains transporting flammable cargo. As a precaution, municipalities prohibited open flames, especially after a particularly hot Tuesday.

Canada’s wildfire season, running from April to October, seemed less severe initially due to moisture from rainfall and cooler temperatures. However, the smoke and heat wave affected areas like Ontario and the northeastern United States concurrently. The Canadian Interagency Forest Fire Center reported 838 active wildfires. Though 4.7 million forest acres have burned this year, this figure is considerably lower compared to 22.2 million acres in 2025.

Ontario and the U.S. Northeast are enduring continued smoke and heatwave effects. Temperatures almost reached 100 degrees Fahrenheit, exacerbating the air quality problems.

Reporter Vjosa Isai, based in Toronto, relayed information on Canada’s situation and developments.