After fires destroyed multiple neighborhoods across Los Angeles County, many residents looked up to find blue, smoke-free ...

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

Indicators like the Air Quality Index (AQI), commonly used to track air pollution levels, provide a rough sense of the ...

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

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

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

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 ...

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 ...