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‘Very poor air quality’ Toronto bound as wildfire smoke lingers: Environment Canada

Evening Standard Published Jul 17, 2026 Reviewed Jul 18, 2026 ✓ Reviewed by citations.press editors
Toronto had the worst air quality in the world on Wednesday according to IQAir, a Swiss air quality technology company that operates the world’s largest real-time air quality information platform.
1 · Toronto
Premier Doug Ford reported 191 active wildland fires across Ontario as of Friday morning, with 81 out of control.
191 fires · active wildland fires in Ontario81 fires · out-of-control wildland fires in Ontario
Environment Canada issued an orange air quality warning for southern Ontario that began on Wednesday and remained in effect as of Friday.
3 days · duration of orange air quality warning

Torontonians may see an improvement in air quality Friday afternoon, but it won’t last long as wildfire smoke continues to plague the region.

Torontonians saw an improvement in air quality Friday morning, but “very poor” conditions are returning as wildfire smoke continues to plague the region.

Environment Canada said Friday in its updated orange air quality warning that the smoke from the wildfires in northwestern Ontario is continuing to have an impact on many communities in the province’s south.

The air quality warning has been in place since Wednesday, when Canada’s largest city had the worst air quality in the world according to IQAir, a Swiss air quality technology company that operates the world’s largest real-time air quality information platform.

Environment Canada said Thursday that conditions could improve Friday, and they did briefly.

“Air quality has improved this morning, however very poor air quality will return to all regions this evening and may persist into the weekend,” it said Friday.

The smoke has forced the cancellation of several outdoor events this week, including the FIFA Fan Festival watch party in Toronto on Wednesday and the Rock the Park music festival in London.

Premier Doug Ford has said there were 191 active wildland fires across Ontario as of Friday morning, and 81 are out of control.

The fires have prompted evacuation orders for several communities, including Armstrong, Lac La Croix First Nation, Whitesand First Nation, Gull Bay First Nation and Lac des Mille Lacs First Nation.

One fast-moving blaze has damaged and destroyed homes and buildings on Namaygoosisagagun First Nation, also known as Collins First Nation, north of Thunder Bay.

Ford said crews are hard at work fighting the fires, and the province will spare no expense in keeping people safe.

“We are throwing every single resource we can. … I’ve talked to a number of chiefs and telling them that we’re there to support them,” he said.

Environment Canada is advising Canadians to limit time outdoors and prioritize keeping cool inside.

“You may experience mild and common symptoms such as eye, nose and throat irritation, headaches or a mild cough. More serious but less common symptoms include wheezing, chest pains or severe cough. If you think you are having a medical emergency, seek immediate medical assistance,” it said.

“People more likely to be impacted by wildfire smoke, including people aged 65 and older, pregnant people, infants and young children, people with an existing illness or chronic health condition, and people who work outdoors, should avoid strenuous activities outdoors and seek medical attention if experiencing symptoms.”

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