effects

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

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2005

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wind speed 200kn/h when hit New Orieans(USA)

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$108 billion in property damage

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Storm surges

low air pressure and strong winds

intense low pressure in the eye

sea level to rise

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push the water towards the coast

creating huge waves

sudden rise of the sea level

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massive flooding

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fast moving floodwater

damage properties and farmlands

people will drown

carry debris that can injure people

Hurricane Katrina

c1

2005

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waves of 3 to 10 metres

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massive flooding

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80% of the city New Orieans was flooded

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more than 1200 deaths

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USA

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Torrential rains

heavy rainfall in a short period of time

cause inland flooding

Hurricane Katrina

c1

2005

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heavy rain of 250mm

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caused massive flooding destroying 9 bridges

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almost 1 million people to be without power

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creating huge waves

Impacts of tropical cyclones

Physical impacts

damage any struture

houses, buildings, infrastructure such as bridges and roads

E.g.

Philippines

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2009

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Typhoon Ketsuna

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serious damage to the road networks

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Manila

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tropical cyclone

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80%of health centres were destroyed

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difficulties in distributing food and medicine to those who required

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Economic impacts

cost to repair the damaged property and infrastructure

loss of income

damaged crops

c1

food shortage

c1

e.g

Hurricane Katrina

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2005

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damaged/destroyed 30 oil platform

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closure of 9 refineries

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unemployment

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total economic impact

may exceed $150 billion

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Social impacts

physical infrastructure

water pipes or pumps

c1

destroyed

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spread of water-borne diseases

spread of diseases transmitted by insects

Houses destroyed

people become homelessness

E.g.

Hurricane Katrina

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New Orieans(US of Americas)

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1 million people homeless

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Unhygienic

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looting and rape become common

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