This is a really good question indeed. When we start to think from this perspective, we begin to learn about the wisdom behind the actions happening in the world. First of all, what does natural disasters bring? Death,disease etc.Yes,that's true. However, death,disease and other calamities already exist. Do you know how many people die every day? How many people are in hospital now for seeking remedies? Many many people are dying or suffering every single second already. The only difference is natural disasters reminds us by showing entire picture to us.
Second, as the existence of dark reminds us the value of light, the existence of death reminds us the value of life. Similarly, the existence of diseases reminds us the value of health. If God Almighty did not create death and diseases, mankind would not understand how valuable life and health are. Natural disasters are profoundly helpful in this sense,one could say.Obviously,we are not and should not be keen on to have natural disasters,death or calamities,but that is one of the wisdoms why God sent them to us. What we ought to do is to pray God that He should preserve us from them.
Last but not least, after understanding that these natural disasters are from God All-Wise, we should refer a verse from the Qur'an: “Whatever misfortune happens to you, is because of the things your hands have brought, and for many (of them) He grants forgiveness.” (Surah Al-Shura, 42:30). It is clear that these disasters are the result of our evil actions. What we must do – if any misfortunate happens to us – is to check out our deeds and revise what we have been doing, improve and correct ourselves immediately so that we can be from further punishments
Before answering the question "Why does God allow natural disasters?" It is vital to find out an answer for this one "What is the wisdom behind death,diseases and other calamities?" In order to understand the bounties given us by God...