Natural hazards have a number of adverse effects - they affect the life and health of humans and the survival of other living beings, destroy material goods and deteriorate socio-economic conditions of life. Without neglecting the impact of natural hazards lower intensity, in this paper emphasis is placed on natural hazards with the strongest effects for human health, that is to natural disasters. It covered the impact of various natural disasters on mortality and morbidity during and immediately after natural disasters, including earthquakes, floods and drought, which is to characterize on the Republic of Serbia. [Projekat Ministarstva nauke Republike Srbije, br. 176017]