Wildfire smoke is blanketing large swaths of Oregon, prompting the state's Department of Environmental Quality (DEQ) to extend and expand an air quality advisory that now covers nearly half the state. Smoke from dozens of active fires across southern, central, and eastern Oregon has pushed air quality into unhealthy ranges for sensitive groups and, in some areas, for everyone outdoors.

Counties Under Active Advisories

As of July 24, the Oregon DEQ issued air quality advisories for the following counties due to smoke from multiple wildfires:

  • Baker County
  • Crook County
  • Grant County
  • Jefferson County
  • Union County
  • Wallowa County
  • Wheeler County

Additional central and eastern Oregon counties are under smoke warnings. Conditions are expected to remain elevated through the weekend as active fire behavior continues and overnight winds shift smoke into populated valleys.

Health Impacts of Wildfire Smoke

Wildfire smoke contains fine particulate matter (PM2.5), carbon monoxide, and other toxic compounds that can penetrate deep into the lungs. The health effects range from eye and throat irritation to severe respiratory distress, particularly for:

  • Children under 18
  • Adults over 65
  • Pregnant women
  • People with asthma, COPD, heart disease, or diabetes
  • Anyone who works or exercises outdoors

When air quality reaches Unhealthy levels (AQI 151–200) or higher, the Oregon DEQ recommends all residents reduce outdoor activity, keep windows and doors closed, and use indoor air filtration when available.

Protecting Yourself During Smoke Events

Here are practical steps residents can take right now:

  • Monitor air quality: Check AirNow.gov or the OregonSmoke.org for real-time AQI readings in your area.
  • Use N95 masks: Standard cloth or surgical masks do not filter fine smoke particles. An N95 or KN95 respirator fitted properly provides meaningful protection.
  • Seal your home: Close windows and doors. Use a portable air purifier with a HEPA filter if possible.
  • Limit outdoor exposure: Postpone outdoor activities, especially vigorous exercise, until air quality improves.
  • Create a clean air room: If you can't air condition the whole house, concentrate clean air in one room using a window unit and a HEPA filter.

When Will It Clear?

Air quality forecasters expect smoke concentrations to remain elevated through at least the weekend across eastern Oregon. The pattern may shift as wind directions change Monday, but additional fire growth under red flag conditions could replenish smoke levels. Residents should not assume the situation will improve quickly and plan accordingly — particularly for outdoor workers, livestock owners, and anyone without air conditioning.

For Spanish-language air quality information, visit OregonSmoke.org and select the Spanish option. Smoke advisories are also broadcast on NOAA All-Hazards Radio stations throughout the region.