AbstractKOVÁČ, Mário. Influence of thermal load on dehydration of rescue firefighters during intervention.[Bachelor thesis]. Technical University in Zvolen (Zvolen, Slovakia). Faculty of wood sciences. Department of Fire Protection and Security. Supervisor: doc. PaedDr. Peter Polakovic, PhD. Degree of Professional Qualification: Bachelor.The current rescue activity of firefighters is typical in that it places high demands on firefighters, not only professional but also physical readiness. Interventions of firefighters during fires with extreme temperatures, interventions at high temperatures in the summer months, as well as intervention activities with high intensity of work places extraordinary demands on thermoregulation of the organism. These activities may result in dehydration of the body, which may lead to collapse. The focus of the work will be to describe the methods of measuring body temperature, its normal values and values at different parts of the body and body core, the characteristics of the body's heat balance and the main physiological mechanisms of heat generation in the body. No less important will suggest - describe the procedures to avoid collapse in these cases (Polakovič, 2019).