The air quality index measures PM2.5, less than 2.5 microns particles, to determine the intensity of air pollution in cities.

California Governor Gavin Newsom urged President Donald Trump on Wednesday to support federal disaster relief for his state after devastating wildfires destroyed entire neighborhoods in Los Angeles.

While some Angelenos cast around for someone to blame, a whole cooperative emergency-response system whirred to life.

A new prescribed burn, called Ti Bar Machine Piles, was initiated 8:12 a.m. Feb. 3 in Siskiyou County. The prescribed fire ...

A new prescribed burn, called Yrrd Camp Ss, was initiated today at 8:40 a.m. in Yuba County. The prescribed fire has been ...

Peter Tripp Akemann, 56, agreed to plead guilty to one count of unsafe operation of an unmanned aircraft, federal prosecutors ...

The source of more than half of all wildfires in the Western US remains unknown, so the US Forest Service has teamed up with ...

It’s unlikely — for now — that the damage is catastrophic enough to affect rates and coverage outside of California ...

And in December, the U.S. Department of Justice added to PacifiCorp’s legal woes. The feds filed a $900 million civil lawsuit, claiming the utility’s negligence caused a different 2020 fire in ...

A preliminary estimate from AccuWeather found that the wildfires were the costliest in U.S. history, with the damage valued between $135 billion and $150 billion.