Wildfire smoke is no longer an occasional late-summer inconvenience in the Pacific Northwest — it has become a near-annual public health event that affects millions of residents across Oregon, Washington, and Idaho. With the 2026 season already showing signs of early activity and forecasters warning of a potentially severe summer ahead, now is the time to understand your air quality risks and how to protect your health.

AccuWeather's 2026 fire season outlook warns explicitly that smoke from major fires could create air quality concerns far beyond the areas where fires actually burn. Wildfire smoke from fires in Oregon can reach Seattle; smoke from British Columbia can blanket Portland. The regional nature of smoke impacts means that even residents hours from the nearest fire should be monitoring air quality regularly.

Understanding the Air Quality Index

The Air Quality Index (AQI) measures the concentration of fine particulate matter (PM2.5) in the air — the tiny particles produced in large quantities by wildfire smoke that penetrate deep into the lungs and bloodstream. Health guidance by AQI category:

  • 0-50 (Good): Air quality is satisfactory. No restrictions for most people.
  • 51-100 (Moderate): Unusually sensitive individuals should consider limiting prolonged outdoor exertion.
  • 101-150 (Unhealthy for Sensitive Groups): People with heart or lung disease, older adults, and children should limit prolonged outdoor exertion.
  • 151-200 (Unhealthy): Everyone should limit prolonged outdoor exertion. Sensitive groups should avoid it entirely.
  • 201-300 (Very Unhealthy): Avoid all outdoor exertion. Stay indoors with windows closed.
  • 301+ (Hazardous): Emergency conditions. Everyone should remain indoors.

Where to Check Air Quality

Several free tools can help Pacific Northwest residents monitor conditions in real time:

  • AirNow.gov — the official EPA AQI monitoring platform with current readings and forecasts by zip code.
  • Oregon DEQ Air Quality Index Map — available through centraloregonfire.org and the Oregon DEQ website.
  • FireSmoke.ca — provides BlueSky smoke forecasts showing projected PM2.5 concentrations 48 hours out across the Northwest.
  • PurpleAir — a network of low-cost air quality sensors that can provide hyper-local readings, particularly useful during regional smoke events.

Protecting Yourself During Smoke Events

When smoke settles into your community, there are several steps you can take to reduce exposure:

  • Keep windows and doors closed. Use central air conditioning with a clean MERV-13 or higher filter if available.
  • Run a portable HEPA air purifier in the rooms where you spend the most time.
  • Avoid activities that increase indoor air pollution, such as frying food, burning candles, or vacuuming.
  • If you must go outside, use a well-fitted N95 or P100 respirator — cloth masks and surgical masks provide minimal protection against wildfire smoke particles.
  • Check on neighbors, elderly relatives, and others who may need assistance during prolonged smoke events.

Sign up for local air quality alerts through your county health department or the Oregon DEQ/Washington DOE notification systems to receive updates when conditions deteriorate in your area.