The relationship between topography and the terrestrial water cycle has been documented for thousands of years, yet there is ...

Water moves around the world in "atmospheric rivers" as part of the global water cycle, explained the report from the Global Commission on the Economics of Water. Water evaporates from ground ...

The heaviest of this week's rain cycle is expected to hit Southern California on Thursday. The National Weather Service ...

Southern California is used to the cycle of drought and deluge ... The fires exploded in part because of a lack of winter rain, which left the landscape unusually bone-dry for January. The rains ...