During the time of Noah, it was accepted by almost we believe that there will be floods. The people of God decided to take refuge.
Take for example, an earthquake. These are natural disasters, floods are natural disasters that happen globally. Because talking about flooding this may be caused by some breakage of dam, overflowing of the sea and whole village can be wiped away and there would be damaged life and loss properties. All those things so this can be called natural disaster.
Disaster can be man-made or it can be natural but some of them are mostly natural caused by natural flow, overflow of water. It might cause panic in the country and so many things.
All these things we see, and it has already been written in the Bible, and we also see it today. In Genesis 7:11, it says that in that second day of Noah's life, the second month, the seventh day of the month, the same day, the windows of heaven opened.
These are the things that keep happening around us. Natural disasters we see around us, earthquakes, volcanoes, flooding.