Tropical Cyclones

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1. Properties
   1. Low pressure
   2. Constant rotation
   3. Central "eye" is calmest part surrounded by walls
2. Hazards
   1. Storm Surge
   2. Flooding
   3. Strong Winds
   4. Landslides
   5. Intense Rainfall
3. Formation
   1. Form over warm seas
   2. Energy from condensing water adds power to cyclone
   3. Intensify over water and dissipate over land
4. Vulnerability
   1. Physical
      1. Large coastline
      2. Lots of rivers
      3. Flat land close to sea level
   2. Social
      1. Elderly
      2. Children
      3. Disabled
   3. Economical
      1. Poor
      2. Can't afford defences/shelters
   4. Political
      1. Corrupt government
      2. How is money spent
5. Typhoon Aila
   1. Bangladesh May 2009
   2. Background Information
      1. Category 5
      2. 200mm rainfall
      3. Storm Surge
   3. Effects
      1. 190 deaths
      2. Homelessness
      3. Crops and animals killed
      4. Disease
   4. Preparation
      1. Limited technology for warming systems
      2. Some cyclone shelters for evacuees
6. Hurricane Katrina
   1. Southern US states, esp. New Orleans August 2005
   2. Background Information
      1. Category 5
      2. Storm Surge
      3. Very long track
   3. Effects
      1. 1833 deaths
      2. Heavy flooding
      3. Infrastructure collapsed
   4. Preparation
      1. Satellite and weather forecasting technology
      2. Efficient evacuation systems