Residents across the Pacific Northwest are facing hazardous air quality due to wildfire smoke that has spread from Washington to Oregon and beyond. Seattle and Portland have been particularly hard hit, with Portland ranking as having the fifth worst air quality in the world as smoke engulfs the region. Officials are urging citizens to monitor air quality and limit outdoor activities, as temperatures soar alongside the smoke. Air quality alerts have been issued across several counties, including Yakima Valley and Lane County, with projections indicating that the unhealthy conditions could persist for days. The wildfire situation is compounded by a forecast of continued hot weather, leading to significant health warnings, especially for sensitive groups.