arizona

Wild free-roaming horses will continue to rove national forests in Arizona and New Mexico after a judge granted a preliminary injunction to stop removal of the equines.

Though not listed as endangered, northern leopard frogs have disappeared from most of their historical habitats in Arizona since the 1960s, facing invasive species, long-term drought and a deadly fungus.

Amid decreasing supply, key agreements governing future water use along the Colorado River expired this year. So did initial deadlines to commit to new agreements.

With a newly established Mountain West Geothermal Consortium, Utah, Colorado, Arizona and New Mexico are joining forces to tap what could be hundreds of gigawatts of always on, clean energy lying underground in the Mountain West region.

After 30 years of drought, hydrologists say the Hoover Dam will lose 80% of hydropower production by spring 2027.

As the state faces the possibility of big cuts to its share of Colorado River water, a new poll shows that protecting the water supply is a top issue for likely Arizona voters across the political spectrum.

A judge handed a huge win to developers Tuesday when he blocked an Arizona water rule that put a stop to new housing developments in some areas of the Valley.

Experts say Arizona recorded temperatures in March that shouldn’t have arrived for another two months.

The national monument protects 900,000 acres of land surrounding the Grand Canyon from future uranium mining that local tribes say could contaminate drinking water and otherwise sully sacred cultural sites.

In a mixed ruling, a federal judge said former students lack standing for injunctive relief because there is no imminent threat of future harm.