Water condensate is captured from the exhaust of a generator utilized to provide power to a data center, and the captured water is then utilized for data center purposes such as adiabatic cooling. The exhaust of electrical power generators is passed through a condenser to obtain water condensate from such exhaust. The water condensate is stored in water storage units and is utilized to provide supplemental cooling to the data center. Sporadic usage of water can enable the water storage to be refilled between uses, since water condensate can be obtained from exhaust almost continuously. The level of water is monitored and the level of processing performed by the data center is adjusted to avoid emptying such water storage units. Historical climatological data is utilized to estimate the water required. Additionally, short and long-range weather forecasts can be optionally taken into account.