tsunami
an extremely large wave caused by movement of the Earth under the sea, often caused by an earthquake
flood
a large amount of water covering an area that is usually dry
drought
a long period when there is little or no rain
earthquake
a sudden violent movement of the Earth's surface, sometimes causing great damage
hurricane
a violent wind which has a circular movement
landslide
a mass of rock and earth moving suddenly and quickly down a steep slope
wildfire
a fire which is burning strongly and out of control on an area of grass or bushes in the countryside
avalanche
a large amount of ice, snow and rock falling quickly down the side of a mountain
volcanic eruption
when a volcano explodes inside and flames, rocks, and lava come out of the top
tornado
a violent rotating column of air