Preface Decision aid models for disaster management and emergencies

A disaster is understood as the disruption of the normal functioning of a system or community, which causes a strong impact on people, structures and environment, and goes beyond local capacity of response. In the global world of the 21st century, a disaster that occurs anywhere of the planet affects to the whole human Society. All regions on The Earth are interconnected and any serious problem in any region will not only have direct and terrible consequences on that region, but it will also hit the social and/or economic structure of other countries. The dimension and circumstances of each disaster will determine the relief level needed (regional, national or international), but anyway they require a joint provision strategy of many regions and the concourse of International Organizations, Governmental and Non-Governmental.