Selective water release from the deeper pools of hydropower reservoirs alters the temperature of downstream rivers. Thermal destabilization of downstream rivers can be detrimental to the riverine ecosystem by potentially disturbing the growth stages of various aquatic species. To predict this impact of current and planned hydropower dams worldwide, and to improve river temperature management for better ecosystem outcomes, Happy Earth Solutions have developed a freely available, computationally efficient and fast numerical framework called ‘FUture Temperatures Using River hISTory’ (FUTURIST). The framework used historical records of in-situ river temperatures and remote sensing observations and rapidly predicts temperature change between upstream and downstream rivers that otherwise would be very costly and time consuming using conventional methods. Click here for an illustration of the Happy Earth Solution.