Hazards of tropical cyclone
Wind damage
strong winds(119km/h)
will destroy properties and injuring people
loose debris to fly and hit people
will cause people to injured or killed
Hurricane Katrina
2005
wind speed 200kn/h when hit New Orieans(USA)
$108 billion in property damage
Storm surges
low air pressure and strong winds
intense low pressure in the eye
sea level to rise
push the water towards the coast
creating huge waves
sudden rise of the sea level
massive flooding
fast moving floodwater
damage properties and farmlands
people will drown
carry debris that can injure people
Hurricane Katrina
2005
waves of 3 to 10 metres
massive flooding
80% of the city New Orieans was flooded
more than 1200 deaths
USA
Torrential rains
heavy rainfall in a short period of time
cause inland flooding
Hurricane Katrina
2005
heavy rain of 250mm
caused massive flooding destroying 9 bridges
almost 1 million people to be without power
creating huge waves
Impacts of tropical cyclones
Physical impacts
damage any struture
houses, buildings, infrastructure such as bridges and roads
E.g.
Philippines
2009
Typhoon Ketsuna
serious damage to the road networks
Manila
tropical cyclone
80%of health centres were destroyed
difficulties in distributing food and medicine to those who required
Economic impacts
cost to repair the damaged property and infrastructure
loss of income
damaged crops
food shortage
e.g
Hurricane Katrina
2005
damaged/destroyed 30 oil platform
closure of 9 refineries
unemployment
total economic impact
may exceed $150 billion
Social impacts
physical infrastructure
water pipes or pumps
destroyed
spread of water-borne diseases
spread of diseases transmitted by insects
Houses destroyed
people become homelessness
E.g.
Hurricane Katrina
New Orieans(US of Americas)
1 million people homeless
Unhygienic
looting and rape become common