Wildfire Smoke Blankets Large Swaths of the U.S., Air Quality Deteriorates
Wildfire smoke from the Pacific Northwest is causing hazy skies and unhealthy air quality across large portions of the United States. As of July 29, 2026, 45 large uncontained fires in Oregon and Washington have burned over 1.8 million acres, with additional fires in British Columbia contributing to the smoke. The worst air quality was reported near Boise, Idaho, where particulate matter levels approached 'very unhealthy' thresholds. Eastern Oregon and southern Idaho are also experiencing 'unhealthy' air quality, prompting advisories for residents to limit outdoor activities. The smoke has traveled thousands of miles, affecting areas as far as Florida, though much of it remains aloft. This event follows record-setting air pollution earlier in the month caused by Canadian wildfires. Environmental factors, including a historically warm winter and prolonged heat waves, have exacerbated wildfire conditions this year. 
