Lake Mead, which separates Arizona, bottom, and Nevada, top, is seen from the air, east of Las Vegas in this May 1, 2005, photo. Forecasters say this year’s outlook for the most important river in the Southwestern U.S. remains grim.The National Oceanic and Atmospheric Administration said Monday, May 7, 2018, that April storms failed to produce much snow in the mountains that feed the Colorado River, and Lake Powell is expected to get only 43 percent of the average inflow from the river. (AP Photo/Joe Cavaretta, File)