A towering vortex of flames erupted from an Oregon wildfire over the weekend as historic blazes continued to ravage the Pacific Northwest. Stunning footage captured near Burns shows the so-called 'firenado' twisting through Harney County, where multiple fires have scorched hundreds of thousands of acres. AccuWeather warned that millions across Washington, Oregon and Idaho could face 'Dangerous' or 'Very Unhealthy' air quality as the crisis intensifies. AccuWeather meteorologists forecast 'Dangerous' air quality in Spokane from Tuesday through Friday. Heavy smoke spreading south and east could also produce 'Poor' or 'Unhealthy' air quality across other parts of the western US.