1. A hazard is defined as a potentially damaging physical event, phenomenon, or human activity that can cause loss of life, injury, property damage, or environmental disruption. 2. Hazards are classified as natural, secondary, technological, or quasi-natural. Natural hazards result from earth's natural processes, while technological hazards result from human activities. Secondary hazards are consequences of other hazards, and quasi-natural hazards result from interactions between natural processes and human activities. 3. Examples of hazard types include geologic, hydrologic, atmospheric, biologic, and man-made hazards. Geologic hazards include earthquakes and volcanoes. Hydrologic hazards include floods and drought. Atmospheric hazards include typhoons, tornado