The textbook "Life safety and environmental safety in extreme conditions" is intended for students of higher educational institutions studying in the direction of "Ecology and nature management" of various training profiles related to ensuring environmental safety and solving environmental problems arising in industrial zones and cities, including in extreme conditions. The specifics of various natural and man-made hazards, principles, methods and means of ensuring safety in conditions of natural and man-made accidents and catastrophes are considered. The role of extreme climatic conditions in relation to the causes of man-made accidents, emergency situations and methods of their prevention and elimination of consequences are justified.