Extreme heat is the deadliest weather-related threat in the U.S. In Phoenix, heat kills more people than homicides each year. So the city is turning to an unlikely lifesaver: bags of ice. And the fire department is creating a new model in the battle against heatstroke. For our series, Tipping Point, Ben Tracy of Climate Central shows how this low-tech approach is saving lives.

The U.S. Department of Agriculture has said concerns about the New World screwworm's spread lessened enough to allow the movement of cattle from Mexico at a crossing in Douglas, Arizona.

A wildfire that exploded in size in Reno, Nevada, over the weekend has forced authorities to urge more than 90,000 residents to leave their neighborhoods.

Under the Bureau of Reclamation's plan, California, Nevada and Arizona will collectively reduce water use by 1.25 million acre-feet annually for the next two years, with the possibility of larger cuts depending on conditions.

State prosecutors declined to file criminal charges over allegations that she took part in a pay-to-play scheme with a group home company that received a rate increase from the state after contributing $100,000 to her inaugural celebration.