Wildfire smoke from the dozens of large fires burning across the Pacific Northwest is pushing air quality to unhealthy levels in communities throughout Oregon and Washington, prompting advisories from state environmental agencies and raising health concerns for millions of residents — particularly those with respiratory conditions, the elderly, children, and outdoor workers.

Oregon DEQ Advisories

The Oregon Department of Environmental Quality (DEQ) has issued multiple air quality advisories over the past week covering a broad swath of the state. Eastern Oregon counties have been among the hardest hit, with smoke from the Hagen, Grasshopper, Rowe Creek Complex, Big Grass, and other fires combining to create days of sustained unhealthy air quality conditions.

Recent advisories have covered Hood River, Jefferson, Wasco, Wheeler, and other counties in north-central and eastern Oregon. DEQ advisories indicate that smoke concentrations have been sufficient to push the Air Quality Index (AQI) for fine particulate matter (PM2.5) into the "Unhealthy for Sensitive Groups" and in some areas, "Unhealthy" or "Very Unhealthy" ranges during the peak smoke periods.

Washington Air Quality Alerts

Washington's air quality agencies have also been active. The Northwest Clean Air Agency issued an Air Quality Alert for Skagit and Whatcom Counties, while the Southwest Clean Air Agency issued advisories for Skamania County, with intermittent smoke impacts expected in adjacent areas. The Washington Smoke Blog, maintained by the state's air quality agencies, has reported that smoke continues to impact central Washington communities amid the ongoing active fire conditions.

The pattern of smoke transport varies daily based on wind direction, temperature inversions, and fire behavior. Communities that experienced smoke relief earlier in the week found conditions deteriorating again as new fire growth pushed additional smoke into populated valleys.

Health Guidance for Smoke-Affected Communities

Health officials recommend the following protective measures when smoke is in your area:

  • Stay indoors as much as possible and keep windows and doors closed.
  • Use an air purifier with a HEPA filter if available — even a DIY box fan with a MERV-13 furnace filter can significantly reduce indoor particulate levels.
  • Avoid strenuous outdoor activity, especially during the afternoon when smoke concentrations are often highest.
  • N95 respirators provide protection against smoke particles if outdoor exposure is unavoidable — cloth masks and surgical masks do not filter fine particulate matter effectively.
  • Check on neighbors, the elderly, and others who may need assistance.
  • Keep pets indoors when possible.

Monitoring Resources

Residents can monitor real-time air quality conditions at airnow.gov, which aggregates sensor data from monitoring stations across the region. The Oregon Smoke Information blog at oregonsmoke.org and the Washington Smoke Blog at wasmoke.blogspot.com provide detailed forecasts and explanations of smoke transport patterns tailored for the Pacific Northwest.

Fire managers and meteorologists note that smoke conditions will remain variable until fire activity begins to diminish, which may not occur until fall rains arrive — likely not until late September or October in much of eastern Oregon and Washington.