Data on the impact of climatic warming on a number of phenomena in the life of plants, animals, biocenoses, and parasitic systems of transmissible diseases are presented. Emphasis is laid on the ambiguity of responses shown by species to the same exposures, which makes any forecasting of the consequences of climatic warming very difficult, frequently unrealistic and hence it is necessary to arrange an epizootological monitoring of malaria and other transmissible diseases.