The hydrologic cycle is made of several factors. The water on the earth's surface mainly from oceans is released by evaporation and transpiration. As the water travels up into the atmosphere, condensation occurs. Once these water molecules become heavy enough they return to the surface of the earth through precipitation. On the surface the water is assimilated back into the earth through infiltration and runoff. This process if what is called the hydrologic cycle or water cycle. The balance in this process is perfect. The water that evaporates is in portion to the precipitation. Should anything occur to this balance the earth would inevitably deal with the consequences. Warmer temperatures may cause droughts.