Canadian wildfire smoke is affecting parts of the United States, with over 180 wildfires reported in Ontario and nearly 850 across Canada, according to NASA. More than 20 states have issued air quality alerts due to the smoke, which is primarily composed of fine particulate matter (PM2.5) that can penetrate deep into the lungs and bloodstream.
Dr. Fernando Safdie, a lung cancer specialist, stated that PM2.5 poses significant health risks, particularly for sensitive groups. The U.S. Environmental Protection Agency (EPA) indicates that an Air Quality Index (AQI) above 100 is unhealthy for sensitive groups, while levels above 150 are unhealthy for everyone. Common symptoms from wildfire smoke exposure include burning eyes, scratchy throat, coughing, and in severe cases, chest tightness and shortness of breath.
The American Heart Association notes that wildfire smoke can strain the cardiovascular system and has been associated with increased emergency room visits for heart-related issues. Long-term exposure to fine particulate matter has been linked to chronic health conditions, including heart and lung diseases, cognitive decline, and complications during pregnancy.
Children, older adults, pregnant women, and individuals with pre-existing heart or lung conditions are particularly vulnerable to the effects of wildfire smoke. The CDC and EPA recommend monitoring air quality, staying indoors during high smoke levels, and using air purifiers to mitigate health risks. Individuals are advised to wear N95 respirators when outdoors and to seek medical attention if they experience severe respiratory symptoms.