In future we will have to face some more natural disasters due to abnormal climate changes. As a result of global warming, the sea water vaporization also increasing. So the natural water cycle is being complicated. And unexpected heavy thunder showers may be occurred. Another thing is effect of floods, due to global warming the expansion rate of sea water is also high. As a result of this there will be a disturbance for discharging the excessive water of land areas to sea. So there will be more threat of floods. However the regular wet regions will be wet more, while the regular dry regions become dryer.