1. The problem of the thermics of hydrostations has recently acquired an acute character from the viewpoint of the effect of the pools of hydrostations on the microclimate of the region and it is in need of a prompt solution, since it can become an obstacle for substantiating the construction of many highly efficient hydrostations in regions with a harsh climate. 2. Thermal forecasts should be developed at an early stage of designing a hydrostation and should be taken into account when selecting the site of structures, capacity, and operating regime of the hydrostation. 3. A thorough survey and study of operating hydro developments are needed for developing measures to improve the ecological situation and for using the on-site data when creating standard methodological documents for designing and forecasting. 4. A purposeful scientific and technical program should be devoted to a study of the effect of the thermies of hydrostations on the environment, which unites the efforts of many organizations of the USSR Ministry of Power and Electrification, Academy of Sciences of the USSR, State Committee on Hydrometeorology and Environmental Monitoring, State Education Committee, etc., and which is presently being formed by VNIIG.