Early Wednesday, parts of Arizona, California, and Oregon faced “unhealthy” levels of fine particle (PM2.5) pollution, according to AirNow’s live map. Affected areas include Payson, AZ, and regions near the California–Oregon border, such as Klamath Falls and Tule Lake. The EPA advises sensitive groups to limit outdoor activity and others to take breaks or move indoors. Poor air quality poses health risks, especially for children, older adults, and people with respiratory conditions, highlighting the ongoing importance of air quality monitoring.