This document discusses disaster nursing and disaster management. It begins by defining disasters and describing common types of natural and human-induced disasters that occur in India. It then outlines the phases of a disaster - pre-impact, impact, and post-impact - and discusses disaster nursing principles, roles and responsibilities of nurses during disasters. The document also covers disaster triage, factors affecting disasters, health effects of disasters, and the nurse's major roles in disaster management including assessing needs, prioritizing responses, and coordinating aid efforts.