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 ...

A "strong atmospheric river" could bring more rain and mountain snow to the Northwest, according to forecasters.

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 ...

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.

Southern California is bracing for heavy rain, gusty winds and cooler temperatures as a Pacific storm, fed by an atmospheric river, moves inland through the region.

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 ...

For decades, scientists have generally thought that rivers emit more carbon dioxide, a greenhouse gas, than they take in. But ...