This summer, when the temperature hit 110 degrees Fahrenheit or above in Phoenix for 31 straight days, many were fretting about the Southwest’s prospects in the age of climate change. A writer for The Atlantic asked, “When Will the Southwest Become Unlivable?” Bloomberg wondered, “How Long Can We Keep Living in Hotboxes Like Phoenix?”
The first sign of serious trouble for the drought-stricken American Southwest could be a whirlpool. It could happen if the surface of Lake Powell, a man-made reservoir along the Colorado River that’s already a quarter of its former size, drops another 38 feet down the concrete face of the 710-foot Glen Canyon Dam here. At that point, the surface would be approaching the tops of eight underwater openings that allow river water to pass through the hydroelectric dam.
