The US faces a shortage of hydroelectric power in western states as the runoff of water from the mountains is only 25% of its normal level. The drought in California and the lack of hydroelectric power will lead to blackouts in the state. Normally Hoover dam provides electricity to power 1.3 million homes with 23% going to Nevada, 13% to Arizona, and the rest to Southern California. With the water levels low in Lake Mead, Hoover Dam will provide only a small fraction of the electricity it normally does to California. Colorado river's Lake Powell which feeds into Lake Mead has only 25% of its normal water levels.
The dry winter and spring led to less snowpack to feed rivers and streams in California, with loss of enough water to produce electricity for about 1 million homes for a year. This means more blackouts will hit California and western states.