Just how many rivers are there in the United States? Based on this map, a hell of a lot more than you might think. Nelson Minar put this wonderful map together. He put all the data the files he used ...

Advocacy group American Rivers compiles a yearly list of America's most endangered rivers. This year's most endangered river is the Colorado River. It's the river's second year topping the list.

An atmospheric river will deliver heavy rain, scattered flooding, and gusty winds from the Pacific Northwest through the northern Great Basin and Rockies in the coming days, the National Weather ...

CORRECTION: This story has been updated to reflect the average amount of water used by California families, about one-third of an acre-foot, based on a statewide average. California, Arizona and ...