Thick smoke from rampant Canadian wildfires has blanketed multiple regions of the U.S., with the Great Lakes states facing some of the nation’s most hazardous air conditions. Officials warn that lingering haze poses significant health and travel concerns.

Residents near the Tijuana River Valley can now apply for free air purifiers through a new program by the San Diego County Air Pollution Control District. The initiative aims to mitigate odors from cross-border pollution affecting South Bay communities.