Federal aid expanded after deadly New Mexico floods wreck homes, roads, and water systems in multiple counties.

A new study finds that human settlement and 20th-century infrastructure projects caused changes in the Great Salt Lake that stand out from 8,000 years of natural history.

California’s new water strategy names the Delta Conveyance Project as the most effective step to secure long-term supply reliability.

Bartell Ranch and Lithium Nevada have settled a major Nevada water rights dispute over the Thacker Pass lithium mine, with the Nevada Supreme Court dismissing all appeals.

The California Department of Fish and Wildlife has approved a permit for Yucca Valley’s sewer project, replacing septic tanks to protect groundwater and western Joshua trees while offering...

Exceptional drought spread in Colorado and Wyoming, while Arizona and Utah saw worsening conditions amid weak monsoon rains.