“A disaster is a natural event that negatively affects life, property, livelihood or industry often resulting in permanent changes to human societies, ecosystems and environment. ”

As the definition suggests, disasters are highly disruptive events that cause suffering, deprivation, hardship, injury and even death, as a result of direct injury, disease, the interruption of commerce and business, and the partial or total destruction of critical infrastructure such as homes, hospitals, and other buildings, roads, bridges, power lines, etc. Disasters can be caused by naturally occurring events, such as earthquakes, hurricanes, flooding, or tornadoes Certain types of natural disasters are more likely to occur in particular parts of the world. No place is absolutely safe from natural disaster. In this year, 2010, many natural disaster occurred in the world and caused many serious consequences. VietNam is also one of countries where affected the most serious by natural disaster, speacially flood in Ha Tinh, Nghe An provinces. It swept away houses, furnitures, and all things which are necessary for life of human being. Specially, many people died, made families lose close relatives. Life becomes much more miserable, people are poorer, and government also must invest more money to rebuild material facilities. In general, flood as same as natural disaster is very terrible with life and it is also hard to prevent. This is one of the most important problems which all people still greatly notice because it threads directly life of human being. Thus, most people pay more or less attention to the news of this issue. That is why this topic was chosen for study.