The advisories impact large areas of Idaho, Oregon, Montana and Washington, lasting through the end of January.

An air quality alert was issued on Tuesday at 5:03 a.m. for Josephine County.

Toxic smoke and dangerous particulate pollution are spreading far beyond the flames, leaving air quality at unhealthy levels ...

Wear a tight-fitting N95 mask at the bare minimum, but a P100 is better, experts say. Wear long sleeves, eye protection, closed-toed shoes and cut-resistant gloves. Clean or decontaminate anything ...

A Palisades Fire victim who is a pulmonologist sets up a Disaster Relief Pulmonary Clinic Amidst strong winds expected on the evening of Jan. 20 through late in the evening on Jan. 21, the Los Angeles ...

The air has improved in the LA region as firefighters get blazes under control, but there are questions about how safe the ...

The Air Quality Index measured 156 near Forks, Washington, and received a rating of "unhealthy," meaning some members of the ...

Meteorologist Danielle Banks from Weather.com explains that air quality can be affected by wildfires even hundreds or thousands of miles away. Smoke particles can linger in the atmosphere for weeks ...

After fires destroyed multiple neighborhoods across Los Angeles County, many residents looked up to find blue, smoke-free ...

The National Weather Service is warning of air stagnation and dense fog in the Willamette Valley. Advisories have been issued for both events. Dense fog is expected to persist until 1 p.m ...

"Light winds and limited air movement will lead to a period of stagnant air conditions," NWS said, warning of "deteriorating air quality for people with respiratory problems" and "visibility one ...