Learn what the air quality index (AQI) means, how it impacts your health, and how to stay safe when pollution is high.

If you have been hearing about poor air quality in New York City Friday, you can breathe a deep sigh of relief (literally): ...

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

One possible reason for bad air quality in the city is a fire that broke out yesterday afternoon in Lancaster, Pennsylvania, ...

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

Unlike typical wildfires, smoke from the L.A. fires — consisting of toxic materials from burned down homes, cars, and more — ...

Angelenos still bothered by the smell of smoke may be surprised to see that Air Quality Index numbers returned to “healthy” or “moderate” levels this week in L.A. County, but they shouldn ...

Those groups particularly sensitive to particulate matter in the air may want to limit time outside Friday and Saturday.

Calculating air pollution from wildfires and other events has become more complicated. That doesn’t mean it’s necessarily ...

The LA wildfires have burned tens of thousands of acres – but on some weather maps, air quality still looks good. What’s ...

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 ...

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