Meet Arizona's water one-percenters

In Phoenix, two cities are emerging: one is water-rich, the other water-poor

Every two weeks, Dawn Upton floods her lawn. She treks into her back yard, twists open two valves big as dinner plates, and within minutes is ankle-deep in water.

You have to have irrigation boots, girl," she says during a video tour of her property in Mesa, a suburb of Phoenix, Arizona. She flips her camera to reveal green grass, then tilts her phone skyward at four towering palm trees. As she walks, she pans across pecan, pomegranate, and citrus trees - lemon, orange, a grapefruit sapling. A tortoise, between 80 and 100lbs, lumbers toward her, chewing. There's Simba," Upton says. Hey buddy! What is that, Simba? You can't eat it." She pats him affectionately on the head.