The Colorado River, or the "Lifeline of the Southwest," is an essential source of water for 40 million Americans in the West, including 80% of Arizonans. But thanks to climate change, it is drying up—and the effects are being felt unequally. On this first installment of our three-part series on water use in the desert, we visit a 30-year-old man whose 100-year-old family business is at risk of falling apart.