Wildfire smoke impacting parts of Ontario, including Waterloo Region

The Kitchener, Ont. skyline was partially obscured by smoke in this image from June 5, 2025.

A special air quality statement is in effect as wildfire smoke blows across southern Ontario.

The smoke originates from wildfires burning in the prairies, B.C. and northern Ontario. It is expected to move into Waterloo Region on Thursday night and into Friday morning, causing poor air quality and reduced visibility.

People sensitive to smoky conditions may notice mild eye, nose and throat irritation, headaches or even a mild cough. More serious symptoms can include wheezing, chest pains or a severe cough.

The most vulnerable groups are anyone aged 65 and older, pregnant people, infants, young children, people who work outdoors and people with existing or chronic conditions.

Residents are encouraged to limit their time outdoors and keep their windows and doors closed as much as possible. Using a good quality air filter or a certified portable air cleaner can help filter fine particles in the smoke.