This document defines and provides the pronunciation for several types of natural disasters: avalanche, hurricane, cyclone, earthquake, tsunami, tornado, forest fire, blizzard, drought, flood, and monsoon. It explains that an avalanche is a large mass of snow falling down a mountain, a hurricane is an extremely violent wind or storm, and a cyclone is a violent tropical storm where the air goes round and round. Earthquakes cause the ground to shake, tsunamis are huge waves caused by earthquakes that flow onto land, and tornadoes are tall columns of air spinning very fast. Forest fires are big fires that can destroy trees and houses, blizzards are very bad storms with snow and strong winds