As smoke from wildfires in northern Ontario drifts down, turning the skies over southern Ontario and beyond a strange orange hue during a heatwave, an air quality expert from the University of Waterloo is reiterating warnings for residents to take straightforward steps to safeguard their health.
Dr. Rebecca Saari, a professor of civil and environmental engineering and Tier 2 Canada Research Chair in Global Change, Atmosphere and Health, examines both immediate and long-term health effects linked to climate change, climate policies, and major factors contributing to poor air quality such as wildfires.
What are the immediate health risks for people in Canada and the U. S. facing poor air quality due to the current wildfires in northern Ontario?
Individuals may experience various symptoms like throat irritation, coughing, and headaches. Numerous studies have identified clear connections between wildfire smoke and respiratory issues. Those with pre-existing health conditions-particularly respiratory or cardiovascular problems-face a greater risk for severe outcomes such as asthma attacks that might need hospitalization; this also applies to children and older adults.
Why are areas far away from the actual fires showing noticeable signs of smoke in the air?
Wind patterns can transport smoke directly from fires into populated areas. The fires release smoke particles along with other harmful pollutants that can create haze or smog. Larger particles tend to settle quickly while smaller submicron particles can stay suspended in the atmosphere for weeks unless washed away by rain or other means. As a result, fires can degrade air quality locally as well as across vast distances. Hot, sunny days often fuel more fires along with increased haze and smog.
What long-term health risks come with continuous or repeated exposure to bad air quality caused by wildfires?
Research indicates that long-term risks are significant; Health Canada estimates around 17,000 Canadians die prematurely each year because of exposure to air pollution-alongside more than 35 million person-days experiencing acute respiratory symptoms yearly. The economic impact of air pollution in Canada is currently estimated at over $140 billion annually. Wildfires are a major source of particulate matter-the pollutant that poses the greatest danger to public health. A recent study suggested that wildfire smoke results in annual health damages ranging from approximately $500 million to over $6 billion across Canada.
What measures can individuals take to protect themselves during the summer fire season?
It’s crucial to pay attention to air quality alerts and follow recommendations provided by the Air Quality Health Index. This usually involves limiting outdoor activities during severe pollution events-especially vigorous exercise. When staying indoors, keep windows and doors closed while using filtration systems like central HVAC with an air filter or indoor purifiers. If avoidance isn’t possible, consider wearing a properly fitting N95 mask that offers protection against smoke particles.
This series aims to share insights from University of Waterloo researchers with media outlets. For interview arrangements with this researcher, please contact Media Relations.
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This series aims to share insights from University of Waterloo researchers with media outlets. For interview arrangements with this researcher, please contact Media Relations.
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