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Amid explosions and darkened skies, the crew at Mountain High ski resort jumped into action, firing up a hundred snow cannons to douse the flames with water.

An EPA directive that all drinking water systems in the nation remove their lead pipes may not solve contamination concerns at L.A. public housing complexes.

The removal of dams on the Klamath River has enabled salmon to swim far upstream to spawn. Wildlife officials have found salmon upstream in Oregon.

The decision by Phillips 66 this week to shutter its refinery in Wilmington next year will wipe out more than 8% of the state's crude oil processing capacity.

Complaints of acrid odors, fiery accidents, soot and harmful emissions have gained new resonance in recent years.

A federal judge ruled the Bureau of Land Management's off-road plan didn't show how it minimized impacts to the desert tortoise, a move environmentalists hope will lead to safeguards for the reptile that has seen dramatic declines.

A weak La Niña is expected this winter, federal experts say. Drier-than-average conditions are likely in the Southwest, but California's outlook is uncertain.

Supreme Court rejects a series of emergency appeals from Republican-led states and the coal and electric power industries.

Lawyers for San Francisco told the court it was 'unfair and unworkable' to hold the city potentially liable for huge fines because of polluted water along Pacific beaches near the city.

One candidate will greenlight a 21st century sagebrush rebellion. The other will protect the public treasure of Utah's red rocks, mountains and deserts.