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A short class with Sarah and her students. The other ways are under More.
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Today, we're going to learn about hazards. What do you think a hazard is?
Isn't it something dangerous that can happen?
Exactly! A hazard is a potentially damaging physical event or human activity. Can anyone tell me what components define risk related to hazards?
Is it exposure and vulnerability?
Correct! So, risk is determined by hazard, exposure, and vulnerability. Remember this as 'HEV.' Can anyone tell me why it's important to understand these components?
So we can prepare better for disasters?
Exactly! Let's summarize: a hazard is linked to potential harm, exposure is about who or what is affected, and vulnerability is how susceptible they are to that harm.
Now, let's talk about the types of hazards. Can anyone name one type of natural hazard?
Earthquakes!
Great! Earthquakes fall under geological hazards. What others can you name?
Floods and droughts are hydro-meteorological hazards.
Perfect! Hydro-meteorological hazards include floods, cyclones, and droughts. Understanding these helps us identify potential risks in different environments. Can someone define what biological hazards are?
Outbreaks of diseases and infestations?
That's right! Biological hazards include outbreaks of epidemics. Remember that technological hazards can also be significant. These can arise from failures such as those at an industrial site.
Let’s examine how socio-economic status affects disaster impact. Why do you think low-income countries are more affected by disasters?
They probably have less money to prepare or recover?
Exactly! The poorer the community, the more likely they are to suffer from disasters like floods and droughts. Can anyone think of an example from our previous lessons?
We learned about floods in Bangladesh affecting many people.
Correct! The impact of these disasters emphasizes the need for effective disaster risk management in vulnerable populations. Remember, frequency and duration are important when evaluating hazards!
A potentially damaging event that can cause loss of life or property.
The presence of people and properties in at-risk areas.
The characteristics that make a community or system susceptible to hazards.
Hazards that originate from natural processes of the Earth.
Hazards resulting from human-made processes.
Hazards related to water and atmospheric conditions.
Hazards from geological processes like earthquakes.
Hazards from biological phenomena like disease outbreaks.
Hazards can be quite a scare, if you’re exposed without a care.
Imagine a small town near a river, at risk of floods. The town builds levees (defenses) because they know the history of heavy rainfall. The community learns to prepare and lessen the impact of the next flood.
Use 'HEV' to remember Hazard, Exposure, Vulnerability.
H for Harmful events, E for Exposed areas, V for Vulnerable communities.
Term
What defines a hazard?
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Term
What are the three components of disaster risk?
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Term
What is a natural hazard?
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Term
What are geological hazards?
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A potentially damaging physical event or phenomenon that may result in loss of life, injury, property damage, or disruption.
The presence of people, property, or infrastructure in hazard-prone areas.
The susceptibility of a community or system to the impacts of a hazard.
Hazards caused by natural processes of the Earth such as earthquakes and floods.
Hazards emerging from technological or industrial activities, including chemical spills.
Natural hazards related to water and atmospheric processes, like floods and hurricanes.
Hazards that originate from geological processes, such as earthquakes and volcanic eruptions.
Hazards resulting from biological processes, including disease outbreaks and infestations.
This section discusses the concepts of hazard, exposure, and vulnerability, defining their roles in assessing disaster risk.
The section explains how various types of hazards, such as natural and technological, can lead to disasters impacting communities. It emphasizes the multifaceted nature of hazards, including their origins and characteristics, and the differential impact on low and high-income societies.
This section explores the concept of hazards and their role in disaster risk management. It highlights three essential components that define risk: hazard, exposure, and vulnerability. A hazard is defined as a potentially damaging event or phenomenon, which can arise from both natural processes (like earthquakes and floods) and human activities. The section categorizes hazards into natural (geological, hydro-meteorological, and biological) and technological hazards, emphasizing their different origins and impacts.
Examples of hydro-meteorological hazards include floods and droughts, while geological hazards encompass earthquakes and volcanoes. Additionally, the section discusses how technological hazards can arise from human actions, such as malfunctions at industrial sites. The global distribution of natural hazards is examined, noting that low-income countries tend to suffer more from such events compared to wealthier nations, illustrating the link between socio-economic status and disaster vulnerability. Key characteristics such as frequency, duration, and extent of hazards are also stated as crucial components within disaster risk management.