Abstract: An auxiliary cooling system is provided, which can be driven by hydraulic power and can be capable of actuating ventilation fans, normally operated by electrical power, when electrical power becomes unavailable, or when electric motors become inoperable. This system can be used as part of a method, wherein voltage can be detected by detectors and transmitted to a monitoring unit. The monitoring unit can make automatic decisions, based on the received detections, concerning whether to turn on or off backup electrical generators, and whether to turn on or off the hydraulic auxiliary cooling system.