GEOLOGY

Detailed explanation-1: -Floods are the most frequent type of natural disaster and occur when an overflow of water submerges land that is usually dry. Floods are often caused by heavy rainfall, rapid snowmelt or a storm surge from a tropical cyclone or tsunami in coastal areas.

Detailed explanation-2: -Natural hazards can be classified into several broad categories: geological hazards, hydrological hazards, meteorological hazards, and biological hazards.

Detailed explanation-3: -Natural hazards occur across different time and area scales and each is in some way unique. Tornadoes and flash floods are short-lived, violent events, affecting a relatively small area. Others, such as droughts, develop slowly, but can affect most of a continent and entire countries for months or even years.

Detailed explanation-4: -Cyclones, Hurricanes and Typhoons are powerful storms that have winds in excess of 119 kilometres per hour (74 MPH). These wind storms can develop either as a result of a confluence of warm and cold winds over the ocean following a thunderstorm or when differing areas of wind pressure conflict.