But air quality can vary on a hyperlocal scale, meaning the network of official sites is "fairly sparse," says Michael Jerrett, an air pollution expert at the University of California, Los Angeles.

On Wednesday morning, air quality all around Los Angeles reached "hazardous," the worst possible rating for air quality. It means just about everyone could experience problems from breathing the air.

The hazardous air quality in Los Angeles is largely a result of smoke from the Pacific Palisades fire, intensified by strong Santa Ana winds. The winds, with gusts reaching up to 100 mph, ...

Is air quality bad outside enough to wear a mask in Los Angeles? An expert explains 02:07. After several wildfires combined to torch tens of thousands of acres of vegetation in Los Angeles County ...

As the wildfires raged and smoke billowed across Los Angeles, officials issued air quality alerts, schools canceled classes and scientists warned about the dangerous - even fatal - consequences of ...

Los Angeles Air Quality Index map. Extreme fire behavior, including "short and long-range spotting," continues to challenge firefighting efforts, Cal Fire said in an incident update Wednesday.

Naturally, people in the Los Angeles area are reaching for their phones to see what the Air Quality Index (AQI) says about the air around them.

This interactive map provides current air quality levels and health recommendations at a neighborhood scale for the entire South Coast Air Quality Management District jurisdiction, which includes ...

Los Angeles has struggled with air pollution problems since before smog became a term. In 1943, smog covered the city so thickly that residents thought they were under a chemical attack.

New household water heaters and heating systems powered by natural gas would be phased out in the Los Angeles basin under two controversial rules that air quality regulators will vote on Friday.

Residents across the Los Angeles Basin and surrounding regions may notice low-flying aircraft maneuvering over urban centers ...