The #ColoradoRiver is shrinking due to #ClimateChange, which means the nation's 2 largest #reservoirs, #LakeMead & #LakePowell, created by #dams, have reached record low levels in recent years amid a #megadrought spanning >2 decades. If #water levels fall much lower, they could lose the ability to generate #hydropower within the massive dams that hold them back, or even lose the ability to pass water downstream.