Natural hazards are the events occurring in nature which affect the civilization and environment in a harmful way. The two main types of natural hazards are geographical hazards like earthquakes, coastal erosion, cyclones, droughts, etc. and biological hazards like plague, infections, diseases, etc. This text discusses the different types of natural disasters in a detailed manner. It also gives thorough insights about their causes and effects on environment. Different approaches, evaluations, methodologies and advanced studies on the impacts and analysis of natural hazards have been included in this text. Scientists and students actively engaged in this subject will find the book full of crucial and unexplored concepts. It is a complete source of knowledge on the present status of this important field.