Central Arizona is preparing for more intense droughts and floods through major water projects with federal support.

North of the California border, scientists just found 21 trillion gallons of water hiding in the cracks of volcanic rock.

Lake Mead is Arizona’s busiest park ... The book has 90 color photos and maps. It is available for $21.95 in parks, stores, and on Amazon. Signed copies are available at rogernaylor.com.

That's almost three times the maximum capacity of Lake Mead, the currently overdrawn reservoir ... That allowed them to map the volume of the aquifer. Previous estimates of water availability ...

A rocky start to the year has put water flows through America's second-largest reservoir on track to decline, unless ...

Beneath the volcanic peaks of the Cascade Range, a surprising discovery has revealed a massive water reservoir. This reserve, ...

The previously unmapped aquifer is estimated to be more than three times the size of the Lake Mead reservoir in Nevada ... the scientists were able to map where there was underground water.

They estimate it could hold at least 81 cubic kilometers of water – or about three times the water in Lake Mead, the reservoir ... That allowed them to map the volume of the aquifer.

An enormous underground water store containing three times the volume of Lake Mead has been discovered hidden ... measuring temperature allowed the researchers to map out the volume of the aquifer.

From Grand Canyon to Petrified Forest to Saguaro National Park, here are the best things to do in Arizona's most beautiful places.