Hoover Dam reshaped the Colorado River and powered the Southwest. Nearby Boulder City tells the human story of the families who built the dam.

Across Arizona, landmarks of the state's earliest days and greatest moments still stand today. Here are seven landmarks and ...

History is full of moments that make you stop and stare at the ceiling for a while. Not the kind of coincidences where you ...

A $40 billion plan proposes massive desalination plants to save the Colorado River, but critics call it "crazy." ...

Hoover Dam is a gravity dam. But if you take a water bottle up there on certain days, it sure looks like the opposite.

Floodwaters lifted homes and cars, causing an estimated $1 billion in damage, and 5,500 people were under evacuation orders ...

Owner Dole Food Company Hawaii said in a statement, “These thresholds are intentionally conservative and based on the time ...

Add Yahoo as a preferred source to see more of our stories on Google. According to the Bureau of Reclamation, enough water passes through the Hoover Dam's generators to fill 15 standard-size swimming ...

Rescuers retrieve 233 people as residents are urged to leave areas north of Honolulu.

Long before Lake Mead existed, a small town called St. Thomas sat beside the Muddy River in southern Nevada. Founded in 1865 by Mormon settlers, the town eventually grew into a community of farms, ...

After two storms struck Hawaii over the past week, causing flooding, officials warned that a large dam on the island of Oahu ...