Pacific Gas & Electric\u2019s Diablo Canyon nuclear plant shut down this week due to an influx of jellyfish. With that closure, California has no operating nuclear facilities on line. San Onofre was taken off line Jan. 31. A tube leak in its year-old steam generators released radioactivity. Further testing by both the operating company, Southern California Edison, and the Nuclear Regulatory Commission, revealed unprecedented wear in the steam generators. Closure of both nuclear facilities marks over 4,300 MW of generating capacity offline. Despite this, there is a 6,000 MW cushion, according to the California Independent System Operator\u2019s forecast. \u201cWe have adequate reserves, but it is certainly a unique day on the grid,\u201d said Stephanie McCorkle, CAISO spokesperson. The grid operator\u2019s website estimated a moderate peak power forecast for April 26 of 27,650 MW. Diablo Unit 2 shut down April 25, according to federal regulators. There was \u201can influx of sea salp\u201d leading to a manual closure of the reactor, the NRC stated. Diablo\u2019s Unit 1 was already closed for maintenance and refueling. PG&E will not restart Unit 2 until conditions improve at the intake structure, the NRC stated.