Is this drought gripping Tucson natural or human-caused?

Most climate scientists agree the warming trend that has prevailed in Tucson and worldwide since the 1980s and ’90s is largely if not completely caused by heat-trapping greenhouse gases emitted into the atmosphere from the burning of oil, coal and other fossil fuels.

Global Heating Will Make Colorado River Basin Drought More Severe

A person can survive 30 days (or more) without food, 3 days without water, and 3 minutes without air. The latest climate research indicates all three will be in short supply as average temperatures on Earth increase.

If ancient drought choked the Southwest for centuries, what does the future hold?

The ancient people of western Utah’s Danger Cave lived well. They ate freshwater fish, ducks and other small game, according to detritus they left behind. They had a lush lakeside view with cattails, bulrushes and water-loving willows adorning the marshlands.

Ancient Puebloans used ice caves to survive droughts

Carbon dating allows us to know exactly when ice was melted for drinking water in pre-Columbian America.

If Aridification Choked the Southwest for Thousands of Years, What Does The Future Hold?

Great Basin Caves tell a story linking climate change to a “worst-case scenario,” with potential impact on 56 million western water users.