This document discusses disasters, including definitions, types, phases and the role of nursing. It begins by defining a disaster according to the WHO and FEMA. It describes different types of natural disasters such as earthquakes, floods and volcanic eruptions. The three phases of a disaster are outlined as pre-impact, impact and post-impact. Nursing goals in each phase are summarized, including rapid assessment, triage and meeting physical and emotional needs. The overall goal of disaster nursing is achieving the best possible health outcomes for those affected.