This life is a test, men are allowed free agency, forces of nature are also set in motion, God only intervenes through faith, and very often through the actions of human beings, but they still have the freedom and choice of whether to heed his call to duty, the call of compassion and service to our fellow man. Paraphrasing a saying I have heard that fits this, actually I will quote the exact saying to distill the thought down to a crystalized, coherent statement: "Sometimes I want to ask God why He allows poverty, famine and injustice in the world when He could do something about it, but I'm afraid He might just ask me the same question". I will also add, natural calamity is set in motion to see how we will react and whether we will help our brothers and sisters, and to give us an opportunity to grow in that capacity to do good, or on the other hand, to prove that we are worthy of far less than this world has to offer us. Every heartache, disability, disappointment, etc. will carry the opposite natural blessing affixed to it in the afterlife, we do not suffer in vain unless the suffering involves sin.