The National Hydrography Dataset Plus High Resolution map of waterways, created by the US Geological Survey ... the historical map of the Mississippi River's many courses. Previously: • Map ...

The nations were trying to finalize updates to the 61-year-old Columbia River Treaty governing shared, cross-border water and ...

"A Pacific storm and atmospheric river will impact the Pacific Northwest states and northern Rockies this weekend," the NWS said.

Many people assume the longest river in the U.S. is the Mississippi, but that title belongs to the Missouri and part of American agriculture history.

Ian Randall is Newsweek's Deputy Science Editor, based in Royston, U.K. His focus is reporting on ... satellite—capture the "swollen" rivers that followed the torrential rainfall.