World's lakes losing oxygen rapidly as planet warms

Oxygen levels in the world's temperate freshwater lakes are declining rapidly—faster than in the oceans—a trend driven largely by climate change that threatens freshwater biodiversity and drinking water quality.

Drought saps California reservoirs as hot, dry summer looms

Each year Lake Oroville helps water a quarter of the nation's crops, sustain endangered salmon beneath its massive earthen dam and anchor the tourism economy of a Northern California county that must rebuild seemingly every ...

California already in throes of drought as summer looms

Summer has not even begun and Lake Oroville, the second-largest reservoir in California that provides drinking water to more than 25 million people, is at less than half of its average capacity at this time of year.

Prehistoric megafloods smaller than assumed

Mighty floods have carved out deep canyons on Earth. New research suggests this may have required less power than previously thought. Collecting such data, however, may be demanding.