Los Angeles braces for a hot day with an Air Quality Alert due to high ozone levels, affecting sensitive groups and advising precautions like staying indoors and limiting outdoor activities.

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.

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.

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.

The alert was in place for Los Angeles, Western Santa Monica Mountains Recreational area and Eastern Santa Monica Mountains ...

Los Angeles County is the focus of an updated air quality alert reported at 5:03 p.m. on Wednesday by the National Weather ...

At 2:43 p.m. on Thursday, the NWS Los Angeles/Oxnard CA reported an air quality alert in effect until Saturday at 11 p.m. The ...

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 ...

Air quality in Los Angeles was at "moderate" levels on Thursday morning, as judged by the EPA's Air Quality Index rating system. Moderate air quality is between 51 and 100, or in the yellow band ...

Kobe Brown erupted for 10 first-quarter points and finished with 14 in the Clippers' 95-92 win over the Rockets.

Los Angeles County is the focus of an air quality alert reported at 1:58 p.m. on Wednesday by the National Weather Service.