Naomi, if you're asking why God inflicts mass disasters on people , you are not alone and the various religions with deities have surely been trying to explain that for quite a while. That they have succeeded in satisfying the faithful says a lot about human nature. What seems evidence against there being a deity is happily taken as evidence that there is one, but one whose actions or inaction are not immediately understood by mere mortals.
Evidently God has created the world and then left us to get on with it as we find it, disasters included. Happily, the Christian god has not stopped us developing the means of mitigating or preventing disasters, pandemics, malaria,TB, earthquakes, fires etc but he has taken a long time since the birth of his son to allow us to do so. And, to be fair, he has allowed some of the developments and discoveries, that now aid us, to be the work of non-Christians or even of atheists.