Wildfire smoke continues to affect communities in and around Washington's Cascade Range, with smoke from multiple smoldering fires pooling in low-lying valleys and creating degraded air quality conditions for residents and visitors. The situation is expected to persist as long as active fires continue burning along the Cascades, even as the broader Pacific Northwest fire season begins its seasonal transition toward fall.

Affected Areas in Washington

Smoke from the Sisi Fire, Luna Fire, Three Queens Fire, and other active Cascade incidents has been particularly noticeable in the following areas:

  • Stehekin and upper Lake Chelan: The Sisi Fire, only 5% contained, continues to produce persistent smoke across surrounding valleys. Overnight temperature inversions trap smoke near the valley floor, leading to degraded morning air quality that can reach unhealthy levels for sensitive groups.
  • Lake Wenatchee corridor: Smoke transport from multiple Cascade fires has impacted the Lake Wenatchee area throughout the week, with hazy conditions most pronounced in the mornings.
  • Cle Elum and upper Kittitas Valley: The Three Queens Fire has contributed to degraded air quality across the Cle Elum area, compounding impacts on residents already managing evacuation-related stress.

Oregon Tourism and Travel Impacts

In Oregon, wildfire smoke disrupted the peak of the late-summer tourism season, particularly across central and eastern parts of the state. Multiple large fires — including the Rowe Creek Complex and Grasshopper Fire — contributed to smoke that blanketed the Deschutes Basin, eastern Oregon plateau, and intermittently affected communities as far west as the Willamette Valley during the peak of the season.

Travel Oregon's statewide travel alerts noted that air quality and access conditions varied dramatically by region, and urged travelers to check air quality conditions before committing to outdoor recreation plans in Central and Eastern Oregon. Air quality index (AQI) readings in some central Oregon locations reached the "Unhealthy for Sensitive Groups" and "Unhealthy" range — between 101 and 200 — during peak smoke events this season. When AQI readings remain in the unhealthy range for three or more consecutive days, visitor behavior and tourism revenue are significantly affected.

Protecting Yourself From Wildfire Smoke

Health officials recommend the following steps during elevated smoke events:

  • Stay indoors with windows and doors closed when possible
  • Use air purifiers with HEPA filters to reduce indoor particulate levels
  • Wear a properly fitted N95 or KN95 respirator mask if outdoor activity is unavoidable
  • Limit strenuous outdoor activity, especially during morning hours when smoke inversions are most intense
  • Check AirNow.gov for current AQI conditions before heading outside
  • Keep sensitive populations — the elderly, children, and those with respiratory or cardiovascular conditions — indoors during elevated AQI periods

Outlook

Air quality is expected to improve gradually across the Pacific Northwest as remaining active fires continue to be contained and seasonal fall rains increase in frequency. However, residents in Cascade valleys and low-lying areas should remain prepared for periodic smoke events as long as large fires remain active in the mountains. Smoke can travel significant distances under overnight temperature inversions, affecting communities far from the fire perimeters. For current air quality data, visit AirNow.gov or Washington's air quality monitoring network through the Department of Ecology at ecology.wa.gov.