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

One possible reason for bad air quality in the city is a fire that broke out yesterday afternoon in Lancaster, Pennsylvania, where air quality is notably unhealthy. Why would a fire more than 150 ...

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

The areas surrounding the wildfire, including the San Gabriel Mountains, the 5 Freeway corridor near Castaic Lake and Santa Clarita, are expected to be the most impacted by the Hughes fire, which ...

The Thai government tackles Bangkok’s smog problem by offering free rides on public transportation for seven days, starting ...

In the aftermath of L.A.’s most destructive wildfires, air quality experts warn that families should be prepared for the “disaster after the disaster” — ...

LA County Sheriff says about 31,000 people were under mandatory evacuation orders while another 23,000 were under evacuation ...

Coverage of when the Hughes fire exploded north of Castaic, the areas under evacuation orders and an extended red flag ...

A wildfire erupted near Castaic Lake Wednesday, sending plumes of smoke into neighboring Ventura County areas. Here's what to know.

The Hughes Fire was first reported shortly after 10:30 a.m. along Lake Hughes Road, near Castaic Lake and the 5 Freeway, ...

Dust and ash left behind from the wildfires across Southern California can be irritating and hazardous when inhaled.

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 ...