Natural disasters, as well as some human-caused disasters, lead to human suffering and create needs that the victims cannot alleviate without assistance. Examples of disasters include hurricanes, tornadoes, floods, earthquakes, drought, blizzards, , war, fire, volcanic eruption, a building collapse, or a transportation wreck. When any such disaster strikes, a variety of international organizations offer relief to the affected country. Each organization has different objectives, expertise, and resources to offer, and several hundred may become involved in a single major disaster. International disaster relief on such a large scale must be properly coordinated to avoid further chaos and confusion both during and after the disaster.