A series of Pacific storms pushing into the Northwest this week are bringing welcome relief to communities that endured some of the worst wildfire smoke on record during the summer and early fall of 2026. Rain and high-elevation snow are flushing residual smoke from the atmosphere and dramatically improving air quality conditions across Oregon, Washington, and Idaho.

A Season of Unprecedented Smoke

The 2026 fire season delivered air quality impacts that were extraordinary in their scope and duration. Eastern Washington communities in Chelan, Douglas, and Okanogan counties experienced some of the worst sustained smoke on record, driven primarily by the Little Giant and Sinlahekin fires burning through summer and into fall.

In Oregon, conditions were similarly grim at times. An air quality monitor in Post, Oregon, registered a "Hazardous" 460 AQI during a peak smoke event in August — among the highest readings recorded anywhere in the state in recent years. Portland briefly ranked among the worst air quality of any major city worldwide during several summer smoke events.

Health Impacts and Protective Measures

Health officials across the region issued repeated air quality advisories and health alerts during the summer months. Vulnerable populations — including children, the elderly, and individuals with respiratory or cardiovascular conditions — were urged to remain indoors, use air filtration, and wear NIOSH-certified N95 respirators when going outside during poor air quality periods.

Public health agencies documented elevated emergency room visits for respiratory complaints during peak smoke days, consistent with research linking wildfire smoke exposure to acute and chronic health impacts. Several school districts in eastern Oregon and Washington canceled outdoor activities and closed schools on the worst smoke days.

Clearing Skies Ahead

With the National Weather Service reporting Pacific storm systems moving through the region, air quality across most of Oregon, Washington, and Idaho has improved significantly. AQI readings across the region have dropped into the "Good" to "Moderate" range for most monitoring stations as of late October.

The improvement is expected to be durable as Pacific weather systems take control of the region's climate through fall and winter, flushing residual smoke, cleaning accumulated particulate from vegetation and soils, and establishing conditions that suppress any remaining late-season fire activity.

Looking Ahead to 2027

Fire and health officials caution against assuming 2026 was an anomaly. Climate projections for the Pacific Northwest continue to trend toward hotter, drier summers, expanded fire seasons, and more frequent extreme smoke events. Communities across the region are encouraged to use the winter months to prepare air filtration systems, stock N95 respirators, and develop household emergency plans before the 2027 fire season begins.

For current air quality conditions, visit AirNow at fire.airnow.gov or the Washington Smoke Blog for regional forecasts.