Detecting the root causes of adverse events and alerting the public is crucial to ensuring successful specialist emergency response and organizing citizen safety. If this fails, it is important to assess the human exposure to the hazards of accidents and natural disasters, and to develop specific protective measures and a framework for public action in the event of emergencies. This can be achieved by preparing people for such situations in a timely manner. The textbook "Civil Defense" sets out the material according to the study program "Civil Defense" for RTU students