Reykjavík’s Health Inspection warns of high particulate matter near major roads in Reykjavík and Kópavogur during calm, dry weather, advising children, older adults, and people with respiratory illness to avoid busy roads and for the public to use alternatives to private cars.

Strong northwest winds are resuspending ash from the 1912 Novarupta-Katmai eruption, prompting an NWS Special Weather Statement for southern Kodiak Island and an aviation advisory up to 6,000 feet. Communities including Karluk, Akhiok, and Larsen Bay may see haze and trace ash; sensitive groups are advised to limit outdoor activity until winds ease Saturday.

Norton Sound Health Corporation issued an air quality alert for Nome after PM10 levels exceeded 301 (hazardous) on Oct. 23. Officials cite recent freeze–thaw cycles and dry conditions for the unusual late-October dust; residents are advised to limit outdoor exposure and use N95 masks.

Smoke from Central Washington wildfires pushed into Spokane on Thursday, raising air quality to unhealthy for sensitive groups and likely lingering into Friday. Forecasters cited the Labor Mountain and Lower Sugarloaf fires and gusty winds as primary drivers, with conditions expected to ease slightly Friday.

In September 2025, multiple wildfires were observed near E.C. Manning Provincial Park, BC, highlighting the increasing prevalence and intensity of wildfires in the region.

Environment Canada has issued a special air quality statement for much of British Columbia as wildfire smoke from B.C., Yukon and the Northwest Territories spreads over the next 24–48 hours. Officials warn of health impacts, especially for vulnerable groups, and advise reducing outdoor exertion and keeping indoor spaces cool and sealed.

British Columbia set a new national September heat record with 40.8 C in Cache Creek, as wildfire smoke triggers widespread air-quality alerts. Multiple heat warnings remain in effect across the province.

Wildfires forced closures of the Coquihalla Highway between Hope and Merritt and Highway 20 east of Bella Coola in B.C., as the Mine Creek fire grew rapidly and jumped Highway 5. Evacuation orders and alerts were issued, and air quality degraded across the province.

Wildfire smoke drove air quality in Yellowknife to high-risk levels, prompting Chief Public Health Officer Dr. Kami Kandola to issue an advisory urging residents to limit outdoor activity and take health precautions. The advisory highlights vulnerable groups and directs people to the Air Quality Health Index for up-to-date information.