The Air Quality Index, or AQI, is the primary system used to warn the public when air pollution is dangerous. It’s based on ...

Ash from the recent LA County fires and burn scars formed by other wildfires in the fall can be dispersed by strong winds.

Wildfires are tearing through thousands of acres in Los Angeles County in California, as strong Santa Ana winds stoke the ...

Los Angeles is now a week removed from the day that multiple devastating wildfires erupted to torch tens of thousands of ...

AirNow is a collaborative effort of federal agencies that provides air quality data across the U.S. The site also has ...

Already known for having some of the worst air quality in the U.S., people in Southern California are now also at risk of ...

As thousands of acres burn across Southern California, wildfire smoke is causing poor air quality in the region and beyond.

Here's what to know about improving your air quality at home during a wildfire—these expert tips help you breathe easier when ...

Several parts of southern California are currently under windblown dust and ash advisories as deadly wildfires continue to ...

I've lived in Oregon for a decade, meaning I've experienced multiple wildfire seasons. You learn quickly, in these conditions ...