The Colorado River is the lifeblood of the American West. Millions of people rely on it to live. But we’re using more water than the river has to give, and it’s already lost trillions of gallons to rising temperatures since 2000. Meanwhile, rampant growth and water-intensive farming have depleted groundwater supplies. This means Western states must fundamentally rethink how water is divided up and used. In this season of “How We Survive,” we find an oasis in the desert, float down Las Vegas’ finest canal and give wastewater a taste as we continue our hunt for solutions to the climate crisis.