Natural disasters are caused by God. They are caused because of the sins of man. The transgressions of man make man experience natural disasters. It is a wake up called for us to know that God is the one controlling.
The first natural disasters were as a result of man's sin. When man sinned and refused to obey the instructions of God, God sent punishment to them. God cause the things which he has created to fight man.
Because of the sins of the generations of Noah, he made the waters under the earth is come forth and flood that whole Earth.
It was the sins of the Ammonites that drove them out of their land of inheritance and grave it to the children of Israel. God told Abraham that when the sins of the Ammonites was full he will drive them out and give the children of Israel the land. Many people have been suffering from several forms of disasters due to their sinful lives. Let us stop committing sin so that we can enjoy a peaceful life.