Wildfires in Canada and Minnesota produce "very unhealthy" air quality across a large section of the United States.
Wildfires in Ontario, Canada, and northern Minnesota have sent a massive plume of smoke across the U.S., creating "very unhealthy" air quality from Minnesota to Virginia. The federal AirNow air quality monitor reported particulate matter levels between 201 and 300, with some areas reaching "hazardous" levels. These conditions are particularly impactful for children, older adults, and individuals with heart or lung diseases. To combat the smoke, experts recommend improving indoor air quality through source control, ventilation, and purification. The administration announced that while the Clean Air Act has significantly improved outdoor air quality over the last several decades, indoor air remains a challenge. Experts suggest using MERV 13 filters in HVAC systems or investing in portable air purifiers equipped with true HEPA filters to capture fine particles. Additionally, homeowners are advised to seal windows and doors to keep out outdoor pollution. While air purifiers are effective, they are not the only solution; regular vacuuming and using damp cloths to dust surfaces also help reduce indoor pollutants.