Public health officials often recommend limiting time spent outside when AQI levels rise, especially for high-risk demographics. Air quality was so poor in parts of Southern California on Friday ...

A spokesperson for the South Coast Air Quality Management District in California told Newsweek: "We expect the highest AQI in the afternoon, and lower AQI before noon and after sunset. Ozone forms ...

When a horrific firestorm enveloped Southern California in January, it affected everyone who calls the region home. Even those far from the burn areas had their lives transformed during the event and ...

That’s worse than the last two yearly reports, which Chicago ranked 17th. California dominated this year’s list, with 9 of the 25 most polluted cities. Los Angeles ranked first for most polluted by ...

After a decidedly weird and only occasionally wet winter, California is once again drying out — and fast. New data compiled by the National Oceanic and Atmospheric Administration shows that ...