"The West Coast could see power brownouts in coming months as hydro power stations struggle with the four-year drought, and in the longer term climate change could cause additional problems for power plants, the U.S. energy secretary said on Monday.

'That is certainly a risk,' Energy Secretary Ernest Moniz told reporters at a Christian Science Monitor breakfast on Monday, when asked whether the region could see a summer of power brownouts, or reductions in availability of electricity supply.

'Hydro power is a renewable (form of energy) but if you look historically there is actually quite a bit of fluctuation from year to year, depending upon what happens over the winter,' he said."
 
Timothy Gardner; reports for Reuters April 28, 2015. [2]