A cooling arrangement , comprising: a closed loop , comprising: a primary side of a liquid-to-liquid heat exchanger, the primary side being adapted for receiving a first cooling fluid heated by a heat source , a first air-to-liquid heat exchanger adapted for receiving the first cooling fluid from the primary side of the liquid-to-liquid heat exchanger, and a first pump adapted for receiving the first cooling fluid from the air-to-liquid heat exchanger and for returning the first cooling fluid to the heat source; a semi-open loop, comprising: a tank adapted for storing a second cooling fluid, a second pump adapted for drawing the second cooling fluid from the tank, a secondary side of the liquid-to-liquid heat exchanger, the secondary side being adapted for receiving the second cooling fluid from the second pump, an evaporating pad adapted for receiving the second cooling fluid from the secondary side of the liquid-to-liquid heat exchanger and to return at least a portion of the second cooling fluid to the tank, and an inlet fluidly connected to a source of the second cooling fluid, the inlet being controlled for maintaining a level of the second cooling fluid in the tank; and at least one fan adapted for causing an air flow through the evaporating pad and through the first air-to-liquid heat exchanger. a closed loop , comprising: a primary side of a liquid-to-liquid heat exchanger, the primary side being adapted for receiving a first cooling fluid heated by a heat source , a first air-to-liquid heat exchanger adapted for receiving the first cooling fluid from the primary side of the liquid-to-liquid heat exchanger, and a first pump adapted for receiving the first cooling fluid from the air-to-liquid heat exchanger and for returning the first cooling fluid to the heat source; a primary side of a liquid-to-liquid heat exchanger, the primary side being adapted for receiving a first cooling fluid heated by a heat source , a first air-to-liquid heat exchanger adapted for receiving the first cooling fluid from the primary side of the liquid-to-liquid heat exchanger, and a first pump adapted for receiving the first cooling fluid from the air-to-liquid heat exchanger and for returning the first cooling fluid to the heat source; a semi-open loop, comprising: a tank adapted for storing a second cooling fluid, a second pump adapted for drawing the second cooling fluid from the tank, a secondary side of the liquid-to-liquid heat exchanger, the secondary side being adapted for receiving the second cooling fluid from the second pump, an evaporating pad adapted for receiving the second cooling fluid from the secondary side of the liquid-to-liquid heat exchanger and to return at least a portion of the second cooling fluid to the tank, and an inlet fluidly connected to a source of the second cooling fluid, the inlet being controlled for maintaining a level of the second cooling fluid in the tank; and at least one fan adapted for causing an air flow through the evaporating pad and through the first air-to-liquid heat exchanger. a tank adapted for storing a second cooling fluid, a second pump adapted for drawing the second cooling fluid from the tank, a secondary side of the liquid-to-liquid heat exchanger, the secondary side being adapted for receiving the second cooling fluid from the second pump, an evaporating pad adapted for receiving the second cooling fluid from the secondary side of the liquid-to-liquid heat exchanger and to return at least a portion of the second cooling fluid to the tank, and an inlet fluidly connected to a source of the second cooling fluid, the inlet being controlled for maintaining a level of the second cooling fluid in the tank; and at least one fan adapted for causing an air flow through the evaporating pad and through the first air-to-liquid heat exchanger. <EOS>