The Air Quality Index (AQI) — which measures the concentration of pollutants in the air — seemed to confirm all was well in the L.A. atmosphere, with low numbers that suggested clean ...

Major air pollutants have declined in recent decades, but USA TODAY’s analysis shows wildfire smoke is taking their place.

Southern California wildfires have spurred smoke advisories by authorities and contributed to hazardous air quality ...

Tens of thousands of people have evacuated their homes and at least two have died in raging fires sweeping across Los Angeles County Wednesday. Multiple wildfires spread by strong Santa Ana winds ...

Angelenos still bothered by the smell of smoke may be surprised to see that Air Quality Index numbers returned to “healthy” or “moderate” levels this week in L.A. County, but they shouldn ...

Here's how to tell if you're in an area at risk. What is the Air Quality Index, or AQI? The Air Quality Index, often referred to as AQI, is a federal measure of the amount of air pollution ...

Share on Pinterest If you live in an area where you may be exposed to wildfire smoke, check your local Air Quality Index (AQI) before exercising outdoors. Jay L. Clendenin/Getty Images Wildfire ...

Get all the news you need in your inbox each morning. According to nationwide Air Quality Index data maintained by USA TODAY, areas hit hardest include central LA county around Chinatown ...

The highest AQI levels will occur in Altadena and other ... to remove viruses and bacteria from the lungs, the EPA says. USA TODAY interviewed two indoor air quality experts in 2023 who offered ...