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.

Delhi recorded a maximum temperature of 23.7 degrees Celsius with moderate air quality on Friday, the India Meteorological Department (IMD) said. The 24-hour average Air Quality Index (AQI) was ...

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

Erin Davis/Axios Visuals Air quality is worsening in the Upper Midwest and Northern California, according to year-over-year data. Why it matters: Poor air quality can lead to long-term health problems ...

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 ...

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

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 ...

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.