Some Natural Calamities are not preventable, means they will and have to occur. Some like acid rain can be prevented by less smoke, less release of carbon dioxide into the atmosphere.

If you are in a natural disaster you should follow some important factors.

Earthquake: hold on to something that is fit into the wall, don't hold on things like Computers, Cupboards, Chairs, Study Table. If on the road, pull over to a safe spot and clear off bridges, or roads that are held high by pillars.

Flood: Go for high rises. Do not swim to escape. Stay in a high rise until the flood has cleared. It is better to live in high rises in flood-prone areas.

Natural disasters have been origination by natural process. It may destroy the World. We must avoid it and think as well as concern about its possible ways to prevent it. Many people are been its victim and are suffering for rest of their life. We are at a time where our society is able to bring the full force of scientific and technological advances to reduce the number of human tragedy and economic losses due to natural disasters. Although, we must take an integrated and diverse approach to disaster reduction, bringing new emphasis to research on disasters, on pre-disaster planning, and on preparedness. It is up to us to include disaster education and preparedness of the public as well as early warning systems, in which people at risk receive, understand, and act upon the warning information conveyed. 

Natural Disasters are the consequences or effects of natural hazards. They represent human, property and economic losses and they signify a serious breakdown in sustainability and disruption of economic and social progress. The overwhelming number of dead or seriously injured and homeless people after the occurrence of a natural disaster and the massive amount of money to be spent for reconstruction and rehabilitation equates to a natural disaster. They are nothing else but extreme environmental events that impact human activities. Hurricanes, earthquakes, tsunamis and volcanic eruptions are the most frequents.