Wildfire Smoke Causes Severe Air Quality Issues Across U.S. Metro Areas
Wildfires in Canada have sent significant waves of smoke into the United States, severely impacting air quality in 25 metro areas. According to the source, these areas experienced PM2.5 levels at or above the 35.5 µg/m³ threshold for a six-day average during the smoke wave from July 14 to July 19, 2026. Spokane, WA, was notably affected by separate fires in the West rather than the Ontario plume. This event highlights a broader pattern of increased wildfire activity across North America and Europe, with Europe nearing last year’s burned area totals as its fire season accelerates. Satellite data from July 19, 2026, shows widespread smoke coverage and active fires across North America. Source time: July 30, 2026. 
