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’t breathe a ...

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

Already known for having some of the worst air quality in the U.S., people in Southern California are now also at risk of ...

Wildfires are tearing through thousands of acres in Los Angeles County in California, as strong Santa Ana winds stoke the ...

AirNow is a collaborative effort of federal agencies that provides air quality data across the U.S. The site also has ...

Some studies have indicated that young children, especially those under the age of 4, are at particular risk because their ...

Here's what to know about improving your air quality at home during a wildfire—these expert tips help you breathe easier when ...