Calculating air pollution from wildfires and other events has become more complicated. That doesn’t mean it’s necessarily ...

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 ...

The USA TODAY analysis focused on days were the Air Quality Index, or AQI, was above 100. At this point, breathing the air primarily poses a risk to sensitive groups but can also impact healthy ...

Wildfire ash carries many carcinogens that could cause short- and long-term health problems, including asthma attacks and ...

Several parts of southern California are currently under windblown dust and ash advisories as deadly wildfires continue to ...

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

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

Smoke from the wildfires can wreak havoc on your health. Here are tips to stay safe.

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

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

As thousands of acres burn across Southern California, wildfire smoke is causing poor air quality in the region and beyond.