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): ...

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

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

Persistent fires led to a haze of air pollution blanketing Oxnard, California. Dramatic footage captured an eerie scene, turning the sky a light orange and covering 598 Town Centre Drive with smoke ...

Today’s air was classified as ‘very unhealthy', referring to a severe health threat, according to the AQI index ...

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 ...

Foggy conditions in Delhi delayed flights and impacted several parts of India on Thursday. The city's temperature was 12.6°C, ...

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

Portland’s air quality is currently comparable to Los Angeles, despite the ongoing wildfires in Southern California.

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

The Oregon Department of Environmental Quality issued an air quality advisory for La Pine Tuesday due to stagnant air ...