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

Wildfire smoke increases tiny particles in the air known as particulate matter that can be harmful to people’s health.

“As long as these fires are burning, there’s just a ton of smoke in the air right now,” Sarah Rees, deputy executive officer ...

A map from AirNow suggests that the air quality around Los Angeles and Anaheim, California, is unhealthy as the Palisades ...

Jim Harbaugh wore a Los Angeles Fire Department hat during his news conference Thursday, a tip of the cap to the men and ...

Smoke from wildfires — like the ones in Los Angeles — can have health consequences. Here's what experts expect.

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

Air quality across parts of California is deteriorating to hazardous levels as strong winds drive rapid wildfire spread and ...

Virtually all of Los Angeles is experiencing "unhealthy" air quality levels amid the devastating fires that ignited in early ...

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

Millions woke up to hazy skies and poor air quality Wednesday morning as crews continued to fight the Palisades Fire in ...

The catastrophic wildfires in Los Angeles County have caused toxic air in the region. NBC News' Steve Patterson reports on ...