As the 2026 fire season accelerates earlier than normal, air quality officials and health agencies across Oregon, Washington, and Idaho are reminding residents to prepare for wildfire smoke — not just this Memorial Day weekend, but throughout the increasingly active summer ahead. While air quality across the Pacific Northwest remains largely good as of late May, satellite imagery has already detected smoke plumes from active fires in western Oregon drifting westward into the Pacific Ocean.

Current Conditions

The AirNow Fire and Smoke Map shows that wildfire smoke is currently impacting air quality in multiple states across the country, primarily driven by fires in California, New Mexico, and Montana. In the Pacific Northwest, air quality readings as of late May 2026 remain in the "Good" to "Moderate" range for most populated areas east and west of the Cascades.

However, weather forecasters are noting that the dry conditions east of the Cascades — with minimum relative humidity values dropping to the single digits in some locations — could support rapid fire growth and smoke production from any new ignitions during the Memorial Day weekend. Isolated thunderstorms possible across the Northern Rockies could also produce dry lightning, sparking new fires and associated smoke events.

Understanding the AQI Scale

Wildfire smoke primarily impacts air quality through fine particulate matter (PM2.5) — tiny particles that can penetrate deep into the lungs. When smoke is present, residents should monitor the Air Quality Index (AQI) for their area:

  • 0–50 (Good): Air quality is satisfactory; normal outdoor activities are safe.
  • 51–100 (Moderate): Unusually sensitive individuals should consider reducing prolonged outdoor exertion.
  • 101–150 (Unhealthy for Sensitive Groups): People with asthma, heart disease, older adults, and children should limit outdoor activity.
  • 151–200 (Unhealthy): Everyone should reduce outdoor exertion; sensitive groups should avoid it.
  • 201–300 (Very Unhealthy): Everyone should avoid prolonged outdoor activity; stay indoors with windows closed.
  • 301+ (Hazardous): All outdoor physical activity should be avoided; health emergency conditions.

Protect Yourself When Smoke Arrives

Air quality can change rapidly when wildfire smoke moves through a region. The following steps can significantly reduce your exposure:

  • Monitor AirNow.gov or your local air district's website or app for real-time AQI readings
  • Keep windows and doors closed when smoke is heavy; use recirculate mode on air conditioners
  • Use a portable air purifier with a HEPA filter in key rooms of your home
  • N95 or KN95 respirator masks provide meaningful protection if you must be outdoors; standard cloth and surgical masks do not filter fine particles effectively
  • Limit vigorous outdoor activity on high-smoke days, particularly for children and those with respiratory conditions
  • Keep your vehicle's ventilation on recirculate when driving through smoky areas

Resources for Monitoring Air Quality

Pacific Northwest residents have access to several excellent real-time air quality monitoring tools:

  • AirNow.gov/fire — The EPA's Fire and Smoke Map with real-time sensor data
  • PurpleAir.com — Dense network of community air quality sensors throughout the region
  • Oregon DEQ — oregondeq.gov provides state-specific air quality data and forecasts
  • WA Ecology Air Monitoring — ecology.wa.gov for Washington state data
  • Idaho DEQ — deq.idaho.gov for Idaho air quality conditions

As the summer progresses and fire activity increases, check these resources daily during active fire weather and before heading outdoors for extended periods. Early awareness is your best tool for protecting your family's health during wildfire smoke events.