It's not known what caused the chemical reaction, but federal officials say the burn zone has grown underground to at least 35 acres.

A smoldering reaction under the Chiquita Canyon Landfill in Southern California has made its neighbors' lives miserable for almost three years.

CASTAIC, California—Firefighters fought to maintain the upper hand on a huge and rapidly moving wildfire that swept through rugged mountains north of Los Angeles and resulted in more than 50,000 ...

Upper South East Moderate 23 Extreme 50 High 29 Moderate 20 Lower South East Moderate 22 Extreme 54 High 43 High 25 Fire Danger Ratings are routinely issued by 5 pm daily during the fire season.