With fire activity already igniting across Idaho and early-season flames having touched the Columbia Gorge, air quality agencies and public health officials across Oregon and Washington are beginning to ramp up communications about smoke preparedness as the region heads into what forecasters expect will be an active summer fire season.

How Wildfire Smoke Affects Your Health

Wildfire smoke is a complex mixture of gases and fine particles produced when wood and other organic materials burn. The most concerning component from a public health standpoint is fine particulate matter — known as PM2.5 — which consists of particles small enough to penetrate deep into the lungs and enter the bloodstream. Short-term exposure to elevated PM2.5 can cause eye irritation, runny nose, coughing, and throat irritation. High-level exposures, particularly for sensitive groups, can trigger asthma attacks, worsen cardiovascular and respiratory conditions, and in extreme cases lead to hospitalization.

The populations most vulnerable to wildfire smoke include:

  • Children and infants
  • Adults 65 and older
  • Pregnant individuals
  • People with asthma, COPD, or heart disease
  • Outdoor workers
  • People who are unhoused

Monitoring Air Quality in the PNW

Oregon DEQ and Washington Department of Ecology both maintain real-time air quality monitoring networks that feed data to publicly available platforms. The most widely used tools include:

  • AirNow.gov — federally maintained network showing AQI by region, updated hourly
  • Oregon DEQ Air Quality Index Map — available at centraloregonfire.org and oregonair.com
  • PurpleAir sensor network — provides hyperlocal readings from community-operated low-cost sensors, useful for real-time neighborhood-level tracking
  • NWS Smoke Forecast — National Weather Service issues smoke dispersion forecasts during fire season, available at weather.gov

How to Protect Yourself When Smoke Arrives

When AQI levels reach the Unhealthy for Sensitive Groups range (101-150) or higher, public health officials recommend the following steps:

  • Stay indoors with windows and doors closed
  • Run air conditioners in recirculation mode, not fresh air intake
  • Use portable air purifiers with HEPA filtration in main living areas
  • Wear a properly fitted N95 or P100 respirator if going outside is necessary — standard cloth and surgical masks do not filter PM2.5 effectively
  • Avoid vigorous outdoor exercise during smoke events
  • Check on neighbors, especially elderly individuals and those with health conditions

Long-Range Smoke Transport

One of the most significant public health challenges of recent fire seasons in the Pacific Northwest has been long-range smoke transport — the movement of smoke from distant fires hundreds or even thousands of miles away. AccuWeather's 2026 forecast specifically warned that smoke from major fires could create air quality concerns far beyond the areas where fires are actively burning. Communities in the Willamette Valley, Puget Sound region, and Columbia Basin have all experienced multi-day smoke events from fires located in California, British Columbia, and even Montana and Alaska in recent years.

Residents are encouraged to check air quality forecasts daily during fire season, keep N95 respirators on hand, and have a plan for spending extended time indoors if a prolonged smoke event affects their community.