Air quality warning persists, smoky conditions continue into weekend
Posted Jul 17, 2026 06:13:12 AM.
Last Updated Jul 17, 2026 03:13:11 PM.
The poor air quality isn’t letting up in Waterloo Region, Guelph and most of southern Ontario.
Environment Canada updated an orange-level severe air quality alert Friday morning, warning of terrible air quality and heavy smoke conditions throughout the weekend.
Friday’s Air Quality Index reading was still at a 10+, the highest level possible. It marked the third day of dangerous air quality levels.
Officials expect Saturday will stay at the “very high risk” level.
Across southern Ontario, some areas may see a bit of relief on Friday, but it will be short-lived.
In Toronto, Environment Canada says the hazy, smoky conditions could temporarily improve before the weekend.

“Limit time outdoors. Reschedule or cancel outdoor sports, activities and events. You may experience mild and common symptoms such as eye, nose and throat irritation, headaches or a mild cough,” said the alert from Environment Canada.
“If you must spend time outdoors, limit the time as much as possible. A well-constructed, well-fitting and properly worn respirator type mask (such as a NIOSH-certified N95 or equivalent respirator) can reduce your exposure to the fine particles in the smoke.”
A slew of forest fires continues to burn across northern Ontario, with flames already razing communities such as Namaygoosisagagun First Nation, also known as Collins First Nation, north of Thunder Bay.
The Ontario government and the Assembly of First Nations have called on Ottawa to provide immediate support, while other provinces such as Alberta have deployed firefighters and water bombers to help.
Prime Minister Mark Carney has said his government is in close contact with its counterparts in Ontario and is ready to help as needed.
Officials say there are 136 active fires in the northwest region, with 63 out of control, along with another 44 in the northeast.
With files from the Canadian Press