Air quality poor as smoky conditions arrive in Ottawa
Posted Jul 14, 2025 07:00:47 AM.
Last Updated Jul 14, 2025 03:10:13 PM.
As extreme heat grips the province, Environment Canada noted Ottawa’s air quality took a hit as smoke from ongoing wildfires in northern Ontario contributes to poor conditions.
The national weather agency says smoke is causing or is expected to cause poor air quality and reduced visibility, which could persist through the day and possibly into Tuesday for some areas.
“Smoke from forest fires over northern Ontario has moved into the area, causing the air quality to deteriorate significantly,” the weather agency says in an air quality statement outside of the nation’s capital.
Environment Canada is urging residents—particularly vulnerable groups—to take extra precautions.
Those most at risk from wildfire smoke include people aged 65 and older, pregnant individuals, infants and young children, those with existing illnesses or chronic health conditions, and people who work outdoors. Officials recommend that these groups avoid strenuous outdoor activities and seek medical attention if they experience symptoms such as coughing, difficulty breathing, or chest discomfort.
“You may experience mild and common symptoms such as eye, nose and throat irritation, headaches or a mild cough,” Environment Canada says. “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.”
Brace for hazy 48 hours
Ongoing wildfires in Saskatchewan, Manitoba, and northwestern Ontario continue to produce massive plumes of smoke that are actively filling the atmosphere. Since Jan. 1, 2025, more than 3,000 wildfires have burned over 5 million hectares across the country.
Monday’s daytime high in Ottawa is expected to reach 31 C, with the humidex values in the upper 39. The air quality health index rating could get to 6 (indicating a moderate risk) in the city.
A scorcher is forecast for Tuesday with sunny skies and a daytime high of 33 C. The humidex is likely to reach 41 on Tuesday, Environment Canada says.
Daytime temperatures could drop slightly by mid-week or Thursday, when cloudier conditions and the potential for rain move in. There is a 30 per cent chance of showers on Thursday, with a daytime high of 30 C.
People could get a break from the extreme heat by the end of the week, when daytime temperatures could drop to a high of 26 C.
