Firefighters in central California appeared on Tuesday to have turned a corner in their battle to corral a deadly wildfire that ranks as the biggest and deadliest in a rash of blazes that have rage

Researchers have just found a huge reservoir of groundwater below California - making the supply of water below the state three times larger than previously estimated.

Staff for California's air regulator on Thursday recommended the state extend its carbon cap and trade system beyond 2020, a move supported by utilities and some environmental groups but opposed by

The burning sensation in the southwestern United States was diagnosed by climate scientists more than a year ago.

The number of trees in California’s Sierra Nevada forests killed by drought, a bark beetle epidemic and warmer temperatures has dramatically increased since last year, raising fears that they will

California's power grid operators warned homes and businesses on Monday to conserve electricity as rising demand for air conditioning stoked by a record-setting heat wave across the U.S.

A stubborn wildfire stoked by triple-digit temperatures raged for a sixth day outside Santa Barbara in coastal Southern California on Monday as crews worked to keep the blaze some have called a "sl

A wildfire fed by parched land and high winds spread in southern California on Saturday, forcing hundreds of people to leave their homes as the blaze formed destructive columns of flames known as f

Hundreds of people have evacuated to escape a wildfire in coastal Southern California and a larger blaze in rural New Mexico as hot weather feeds the flames, raising health concerns in other region

California's greenhouse gas reduction program is in a battle for its life, and uncertainty about its future has spooked buyers of its carbon permits