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2w ago

Multi-State Air Quality Alerts Urge Drivers to Stay Off Roads as Ozone, Smoke Spike

Hot, stagnant conditions together with wildfire smoke are pushing ozone and fine particles to unhealthy levels.

Image
An aerial view of the downtown Dallas skyline on February 22, 2024 in Dallas, Texas.
This photo provided by Deschutes County Sheriff's Office shows crews battling the Flat Fire in central Oregon, on Sunday, Aug. 24, 2025. (Deschutes County Sheriff's Office via AP)
This photo provided by the National Parks Service shows smoke from wildfires in the Black Canyon of Gunnison National Park in Colorado on Thursday, July 10, 2025, after high temperatures, very low humidity, gusty winds, and very dry vegetation across the region led to extreme fire danger. (NPS via AP)

Overview

  • On Friday, the National Weather Service posted air quality alerts across Colorado, Oregon, Washington, Wyoming, Idaho and Montana, with some notices extending into Saturday and Sunday in parts of Oregon.
  • The Colorado Department of Public Health and Environment declared an action day for the Front Range and asked residents to limit use of gas and diesel vehicles until at least 4 p.m.
  • Oregon’s Department of Environmental Quality and the Lane Regional Air Protection Agency kept advisories in place for Lane, Douglas and Crook counties, warning of periods of unhealthy air through Sunday due to regional wildfires.
  • Washington, Idaho, Montana and Wyoming issued smoke-driven alerts for multiple counties, with timing varying from Friday morning expirations to Saturday at noon in northern Idaho.
  • Officials advise sensitive groups to stay indoors and for the public to reduce driving, avoid drive‑thru lines, limit gasoline‑powered equipment use, and monitor NWS and EPA AirNow updates.