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The Sacramento and San Joaquin Rivers are central arms of California's water system.

The charity Oxfam has issued a new report on hunger and climate change. In countries most severely affected, the number of people experiencing acute hunger has doubled in just 6 years.

We asked public health leaders what the World Health Organization should add to its docket in this anniversary year. Answers ranged from pay more attention to teen health to restore the world's trust.

A hot, dry summer has meant the water level on the Rhine River, Western Europe's most important waterway, is at a record low, making it too shallow for many ships to pass.

New cuts will build on last year’s reductions — which all but eliminated some central Arizona farmers’ Colorado River water supply and, to a much lesser extent, reduced Nevada and Mexico’s share.

The megadrought bedeviling the American West got even drier last year and is becoming the deepest dry spell in more than 1,200 years.

Nitrate contamination of well water has been a decades-long problem in the San Joaquin and Salinas valleys — and now stormwater has flushed more fertilizer and manure into aquifers.

State energy officials say threats from drought, extreme heat and wildfires are creating challenges for energy reliability.

A chilly autumn storm brought widespread rainfall and a chance of light, short-lived mountain snow to the San Diego area Tuesday.

The native desert plant has interim protections in the meantime, meaning no one can remove the tree without authorization from the California Department of Fish and Wildlife.