Natural disasters are social disruptions triggered by physical events. Every year, hundreds of natural disasters occur and tens of thousands of people are killed as a result. I maintain that everyone would want to be provided with assistance in the aftermath a natural disaster. If a national government is not providing post-disaster assistance, then we expect that some other institution has the responsibility to provide it. Unfortunately, that is not the case currently. Therefore, in this thesis I argue that in some situations the international community is required to intervene on behalf of those affected by the disaster caused by a natural hazard. Natural disaster intervention is a moral requirement: because the international community has a duty to provide the goods we are entitled to as per the human right to welfare, even in natural disaster scenarios. After making my argument as to why a natural disaster intervention policy should be developed I explain the basic principles of such a policy by applying the Just War criteria to natural disaster scenarios in which a national government is unable or unwilling to provide assistance to its people.