definitions

• Atmospheric hazards


  caused by high and low pressure weather systems
• drought


  a long amount of time when rainfall is below average
• earthquake


  the sudden violent shake of the ground caused by the tectonic plates moving
• fatalities


  a death that results from a disaster or accident
• river flood


  it happens when the water level in a river, lake or stream rises and overflows onto the neighboring land
• geological hazards


  natural hazards to do with Earth's geological processes

  (e.g. volcanoes, landslides, earthquakes)
• hazard risk


  the chance of being affected by a natural event
• landslides 


  a sudden, rapid, downslope movement of large blocks of rock debris and soil along a slide plane
• mudflow


  the flow of water which carries a lot of suspended particles and silt
• natural disaster


  events that have a huge negative impact on society

  (e.g. floods, hurricanes, tornadoes)
• natural hazard 


  extreme natural events that cause problems to society
• Tropical storm


  strong winds and heavy rainfall. A powerful low-pressure weather system.
• tsunami


  a long, high sea wave which causes a disturbance and typically a social impact.
• urbanisation


  the process where an increasing proportion of the population lives in towns and cities resulting in their growth
• volcano


  the vent on the earth's surface, which ejects magma and volcanic materials