A disaster (from Latin meaning, "bad star") is the impact of a natural or man-made hazard that negatively affects society or environment. Disasters occur when hazards strikes in vulnerable areas. The word's roots is from astrology and imply that when the stars are in a bad position, a bad event is about to happen.
Disaster management
Chances of survival after a disaster are greatly improved when people, local governments and emergency services, businesses and national governments prepare survival plans and assemble survival gear beforehand. What constitutes sufficient preparation is highly dependent on the location and the disasters that are likely to occur in the area.