Overview
- Dozens of large fires in Washington, Oregon and British Columbia have burned more than 2 million acres and are exhibiting extreme fire behavior, producing fast-moving blazes and major destruction.
- Three fast-moving fires around Spokane destroyed hundreds of structures, prompted tens of thousands of evacuations, and authorities have arrested a 37-year-old suspect in connection with the largest blaze.
- Smoke plumes from the Northwest and some Rocky Mountain fires have drifted across states and into Canada, degrading air quality from the Bay Area to Minnesota, Colorado and Oklahoma and prompting region-specific advisories.
- Public-health officials warn that smoke contains fine particulate matter (PM2.5) that can harm lungs and hearts and advise checking local AQI, staying indoors with filtration or recirculation, and using N95/KN95 respirators when exposure is unavoidable.
- Fire agencies continue mutual-aid deployments to the hardest-hit areas and say weather will control how long smoky conditions persist, with forecasts showing smoke through midweek and modest improvements as onshore flow returns late in the week.