Wildfire smoke from Canada and Minnesota creates hazardous air quality for 115 million people across the United States.

Wildfire smoke from Canada and Minnesota has created hazardous air conditions for 115 million people across the United States, with over 20 states issuing air quality alerts. The smoke, caused by hundreds of active fires, has pushed air quality into "very unhealthy" and "hazardous" categories, particularly affecting the Midwest and Northeast. Experts recommend staying indoors and using air purifiers to mitigate the impact of fine particulate matter, known as PM 2.5, which can lodge deep in the lungs and enter the bloodstream. The administration suggests using central air conditioning in "recirculate" mode with MERV 13 filters or higher. For those seeking affordable options, a DIY "Corsi-Rosenthal" box—made by taping four to five filters to a box fan—is an effective solution. To further improve indoor air quality, health officials advise sealing windows and doors, avoiding activities that burn fuel like candles or gas stoves, and choosing cleaning products free of harmful chemicals. Residents are encouraged to drink plenty of water and wear masks when outdoors to ease irritation from the smoke.

Sources