In its history, Arizona has battled major wildfires that have scorched large swaths of land, and now new ones are climbing up ...

Arizona officials are celebrating the passage of new groundwater legislation, but setting their sights on upcoming Colorado ...

Lewis, 56, has leveraged the Gila River tribe’s water abundance to help Arizona, making his tribe a power player in the parched region.

A magnitude 8.8 earthquake struck off Russia's Kamchatka Peninsula on July 29, triggering alerts, watches and warnings in some U.S. states.

A massive wildfire in northern Arizona has grown by thousands of acres over the weekend, as firefighters work to regain ...

Here are some of the winners of the annual Southern Arizona Regional Science and Engineering Fair held last week.