Population growth and climate change are stretching America’s water supplies to the limit, and tapping new sources is becoming more difficult each year—in some cases, even impossible. New Mexico, California, Arizona, and Colorado are facing the nation’s most significant strains on water supplies. But across the entire American Southwest, water stress has become the norm. … Farmers use the vast majority of water withdrawn from the Colorado River to irrigate crops—and 70 percent of that is for crops like alfalfa and hay used to feed cattle. The river also supplies drinking water to 40 million people in the Southwest, and in 2022, Lake Mead—which the Colorado feeds—shrank to its lowest levels since it was filled in the 1930s.