Flood A flood is a natural disaster as it is the death of human beings and animals.Crops are destroyed in the flood, which gradually results in increased food prices due to food shortages.In a flood situation, drinking water becomes scarce because water is polluted. ①Due to this, many diseases can spread. Fire Fire is terrible especially forest fire. Forest fire is also known as wildfire. It is a natural disaster caused by a volcanic eruption or by human carelessness. Wildfire can threaten wildlife and the human habitation close to the forest.