A hybrid evaporative heat exchange system comprising: a wet heat exchanger (2A, 2B), optionally wherein the wet heat exchanger (2A, 2B) includes at least one of a direct evaporative heat exchanger and an indirect evaporative heat exchanger; at least one fan (34, 92A, 92B, 115D, 121A, 312) configured to generate airflow relative to the wet heat exchanger (2A, 2B); a dry heat exchanger (12A, 12B) assembly downstream of the wet heat exchanger (2A, 2B), the dry heat exchanger (12A, 12B) assembly including a dry heat exchanger (12A, 12B) configured to raise a temperature of the airflow from the wet heat exchanger (2A, 2B); the dry heat exchanger (12A, 12B) assembly having an operative configuration wherein the airflow from the wet heat exchanger (2A, 2B) flows through the dry heat exchanger (12A, 12B) and a bypass configuration wherein less of the airflow from the wet heat exchanger (2A, 2B) travels through the dry heat exchanger (12A, 12B) than when the dry heat exchanger (12A, 12B) assembly is in the operative configuration; and a control system operatively coupled to the wet heat exchanger (2A, 2B), the at least one fan (34, 92A, 92B, 115D, 121A, 312), and the dry heat exchanger (12A, 12B) assembly, the control system configured to cause the dry heat exchanger (12A, 12B) assembly to be in the operative configuration in response to a determination of plume formation to permit the dry heat exchanger (12A, 12B) to raise the temperature of the airflow; characterized in that the control system is configured to receive either a request to save energy or a request to save water; wherein, in the absence of the determination of plume formation, the control system is configured to: a) operate the wet heat exchanger (2A, 2B) and the dry heat exchanger (12A, 12B) assembly to limit energy consumption in response to receiving the request to save energy; and b) operate the wet heat exchanger (2A, 2B) and the dry heat exchanger (12A, 12B) assembly to limit evaporative liquid usage in response to receiving the request to save water. a wet heat exchanger (2A, 2B), optionally wherein the wet heat exchanger (2A, 2B) includes at least one of a direct evaporative heat exchanger and an indirect evaporative heat exchanger; at least one fan (34, 92A, 92B, 115D, 121A, 312) configured to generate airflow relative to the wet heat exchanger (2A, 2B); a dry heat exchanger (12A, 12B) assembly downstream of the wet heat exchanger (2A, 2B), the dry heat exchanger (12A, 12B) assembly including a dry heat exchanger (12A, 12B) configured to raise a temperature of the airflow from the wet heat exchanger (2A, 2B); the dry heat exchanger (12A, 12B) assembly having an operative configuration wherein the airflow from the wet heat exchanger (2A, 2B) flows through the dry heat exchanger (12A, 12B) and a bypass configuration wherein less of the airflow from the wet heat exchanger (2A, 2B) travels through the dry heat exchanger (12A, 12B) than when the dry heat exchanger (12A, 12B) assembly is in the operative configuration; and a control system operatively coupled to the wet heat exchanger (2A, 2B), the at least one fan (34, 92A, 92B, 115D, 121A, 312), and the dry heat exchanger (12A, 12B) assembly, the control system configured to cause the dry heat exchanger (12A, 12B) assembly to be in the operative configuration in response to a determination of plume formation to permit the dry heat exchanger (12A, 12B) to raise the temperature of the airflow; characterized in that the control system is configured to receive either a request to save energy or a request to save water; wherein, in the absence of the determination of plume formation, the control system is configured to: a) operate the wet heat exchanger (2A, 2B) and the dry heat exchanger (12A, 12B) assembly to limit energy consumption in response to receiving the request to save energy; and b) operate the wet heat exchanger (2A, 2B) and the dry heat exchanger (12A, 12B) assembly to limit evaporative liquid usage in response to receiving the request to save water. characterized in that the control system is configured to receive either a request to save energy or a request to save water; wherein, in the absence of the determination of plume formation, the control system is configured to: a) operate the wet heat exchanger (2A, 2B) and the dry heat exchanger (12A, 12B) assembly to limit energy consumption in response to receiving the request to save energy; and b) operate the wet heat exchanger (2A, 2B) and the dry heat exchanger (12A, 12B) assembly to limit evaporative liquid usage in response to receiving the request to save water. a) operate the wet heat exchanger (2A, 2B) and the dry heat exchanger (12A, 12B) assembly to limit energy consumption in response to receiving the request to save energy; and b) operate the wet heat exchanger (2A, 2B) and the dry heat exchanger (12A, 12B) assembly to limit evaporative liquid usage in response to receiving the request to save water.