world at risk

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World at Risk
When does a natural event become a hazard?
When the natural event has the potential to damage life or property
Event: a hazard that occurs at a particular time.
Context hazard
Widespread global threats due to environmental factors, such as climate change.
Doesn't affect one area, but a range
It is not contained
Human and natural causes
Everybody has to take part to fix it.
A super volcano
Environmental hazard: these are geophysical and hydro-meteorological. Humans usually
make them worse.
Environmental hazard
Natural hazards, caused by geophysical and hydro-meteorological hazards. Mt caused by
Na-ten or quasi natural hazards, where a natural hazard causes another hazard.
Techno hazard, human's error, accidents and systems failures.
Context hazard
Chronic hazards, climate change, environmental degradation, pollution
Environmental hazards
Happens quickly, no time to react. People being exposed to hazards because they live in hazardous
areas. Over confidence in safely. Most direct loss happens immediately, unless there is a second
hazard. A hazard justifies human response and international human aid through the United Nations
and Red Cross.
Vulnerability: a high risk combines with an inability to cope.
Age groups
Lack of money/ development
Risk: the probability of a hazard event occurring and creating loss of lives and livelihood.
Location (plate boundaries)

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Disaster: a hazard becoming a reality in an event that causes death and damage to gods
and property and the environment.…read more

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Vulnerability quadrant
Link to case studies
The risk of disasters grows as global hazards and peoples vulnerability increases, while their capacity
to cope decreases.
The disaster risk equation:
Risk: frequency or magnitude of hazard X level of vulnerability
capacity to cope
The purpose of this equation is to measure the risk, the frequency or the magnitude is increasing. This
can be linked to climate change. How hydro-meteorological hazards are affected.…read more

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Using the risk equation- tackling risk and vulnerability in Bangladesh
Risk: frequency or magnitude of hazard X level of vulnerability
capacity to cope…read more

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Global warming- context hazard (wide spread)
Arguably the greatest hazard we currently face is a chronic hazard: wide spread impacts raises issues
of injustice and has a complex solution.
The green house effect, this is a natural phenomenon, which is essential for life on earth. The
atmosphere traps green house gases, water vapours (the biggest contributor) , carbon dioxide and
methane. These gases trap the warmth. Without the greenhouse effect the earth would be 30
degrees cooler.…read more

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Why might global warming be out greatest hazard?
It's a global problem-
Everywhere will be affected but some areas will be affected more than others.
Its known as a chronic hazard-
It is an ongoing worldwide hazard, which could have more direct impacts on people and property,
having a range of scenarios. One thing could lead to a range of other hazards making other problems
worse. It could also affect climate belts, changing where we get food etc, oceanic and atmospheric.…read more

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Global hazard trends
Some type of hazards are increasing in magnitude and frequency, and having greater impacts upon
people and their lives.
Frequency: how often an event of a certain size (magnitude) occurs.
For example, a flood of 1 meter high may occur, on average every year on a particular river, while a
2m flood may only occur every 10 years. The frequency is called the recurrence interval.
Magnitude: the size of the event (e.g.…read more

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Identifying Hazard Hotspots
Two organisations
Hazard management unit
Centre of hazard and risk management at Columbia university
The risk of death and damage, how exposed (6 major hazards) vulnerability, how densely populated
the area is, how much poverty is that country in (GDP).…read more

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Case study:
The Philippines is situated on a destructive plate boundary, where the
pacific plate sub duct's under the Eurasian plate.…read more

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In 1990, an earthquake on the Richter scale of 7.…read more


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