What is What is a natural hazard??

A natural event that threatens people or property.

What is What does risk mean in hazards??

The chance that people or places will be harmed by a hazard.

Natural Hazards Overview — GCSE Geography Revision

🌋 The Same Earthquake, Two Completely Different Disasters

On 12 January 2010, a magnitude 7.0 earthquake struck the island of Haiti. It lasted around 35 seconds. When the shaking stopped, an estimated 316,000 people were dead, 300,000 were injured, and 1.5 million were left homeless. The capital, Port-au-Prince, looked like it had been bombed.

Fourteen months later, on 22 February 2011, a magnitude 6.3 earthquake struck the New Zealand city of Christchurch. It was weaker than Haiti's earthquake. When the dust settled, 185 people had died.

The maths here should stop you in your tracks. Haiti's earthquake was roughly five times more powerful than Christchurch's. Yet it killed 1,700 times more people. The buildings in Port-au-Prince, mostly built with no enforcement of construction codes, collapsed like cardboard. The buildings in Christchurch, built to strict New Zealand seismic standards, largely held. Emergency services in New Zealand deployed within minutes. In Haiti, the earthquake destroyed the government's own offices, killing civil servants and leaving the state barely able to function. International aid took days to arrive. Cholera, carried in contaminated water, later killed a further 10,000 people — a death toll that would not have happened in a country with functioning water infrastructure.

This is the central lesson of natural hazards geography: physical magnitude does not determine disaster magnitude. Vulnerability, preparedness, and the choices societies make before disaster strikes determine whether an earthquake kills 185 people or 316,000.

🔍 What Is a Natural Hazard?

Three block diagrams of plate boundaries: plates moving apart at a constructive boundary, an oceanic plate sinking under a continental plate at a destructive boundary, and plates sliding past each other at a conservative boundary. These are the plate movements behind earthquakes and volcanoes.

Figure 1: The three types of plate boundary. Arrows show the way each plate moves.

Constructive boundaries are also called divergent, destructive are convergent and conservative are transform. The blocks are not to scale.

A natural hazard is a naturally occurring physical event — such as an earthquake, volcanic eruption, tropical storm, flood, or wildfire — that poses a threat to human life, property, or livelihoods. The critical word is "threat": the event only becomes a hazard when people are in its path.

This distinction matters enormously. Consider two scenarios:

Scenario A: A volcanic eruption on an uninhabited island in the Pacific Ocean
Lava flows destroy acres of land. Ash clouds rise kilometres into the atmosphere. Seismic activity shakes the seabed. But there are no people within 400 km. This is a natural event — not a natural hazard, because there are no humans at risk.

Scenario B: Vesuvius erupting near Naples, Italy
The same volcano, the same lava flows and ash. But now 3 million people live within the danger zone. Tens of thousands of people cannot be evacuated quickly because of narrow mountain roads. This is a natural hazard — and potentially a catastrophic one — because of the human vulnerability surrounding the physical event.

The key insight is that it is human society that turns a natural event into a natural hazard. An earthquake under the ocean with no nearby coastlines is not a hazard. The same earthquake triggering a tsunami that hits a densely populated coastline is one of the most deadly hazards on Earth.

When Does a Hazard Become a Disaster?

A natural disaster occurs when a natural hazard causes significant loss of life, destruction of property, or disruption to human society beyond the ability of the affected community to cope without external assistance.

The transition from hazard to disaster depends on three variables:

Hazard magnitude — how powerful is the physical event? (earthquake magnitude, wind speed, flood depth)
Vulnerability — how susceptible is the affected population? (poverty, building quality, location)
Coping capacity — how able is the society to prepare, respond, and recover? (governance, wealth, emergency services, infrastructure)

A powerful hazard hitting a prepared, wealthy society may cause a manageable emergency. The same hazard hitting a poor, unprepared community becomes a catastrophe. Haiti and Christchurch prove this with devastating clarity.

🌍 Types of Natural Hazard

Natural hazards are classified into four broad categories. Knowing these categories — and being able to give examples for each — is a baseline GCSE requirement for both OCR B and AQA.

Category	Type of Hazard	Named Examples	Caused By
Tectonic	Earthquake, volcanic eruption, tsunami	Haiti earthquake 2010; Chile earthquake 2010; Eyjafjallajökull eruption, Iceland 2010	Movement of tectonic plates
Atmospheric	Tropical storm (hurricane/typhoon/cyclone), tornado, drought, extreme cold/heat	Typhoon Haiyan 2013 (Philippines); Hurricane Katrina 2005 (USA); Sahel drought	Extreme atmospheric conditions, air pressure systems, climate patterns
Geomorphological	Flood, landslide, avalanche, coastal erosion	Vargas, Venezuela landslide 1999 (25,000 dead); Boscastle flood 2004 (UK); Somerset Levels flood 2014 (UK)	Surface processes — water movement, gravity, slope instability
Biological	Pandemic, pest swarm, wildfire, coral bleaching	COVID-19 pandemic (2020); Australia bushfires 2019–20; locust swarms East Africa 2020	Biological processes, living organisms, often exacerbated by climate

A key exam skill is identifying which category a hazard belongs to and then explaining what makes it hazardous. Many hazards interact: an earthquake can trigger a tsunami (tectonic → geomorphological); deforestation increases landslide risk (human action → geomorphological); climate change intensifies tropical storms (climate → atmospheric).

Quick Check: Classify each hazard and give the correct category: (a) Typhoon Haiyan, (b) the Vargas landslide, Venezuela, (c) the 2010 Haiti earthquake, (d) the Australia bushfires 2019–20.

⚙️ The Hazard Risk Equation

Geographers use a formula to explain why different communities face different levels of danger from natural hazards:

Risk = Hazard × Vulnerability ÷ Capacity to Cope

— UNDRO (United Nations Disaster Relief Organization) risk model

This formula tells us several important things:

If hazard magnitude increases (bigger earthquake, stronger storm), risk increases — all else being equal.
If vulnerability increases (more people living in floodplains, poorer construction quality), risk increases even if the hazard stays the same.
If capacity to cope increases (better early warning systems, stronger building codes, wealthier emergency services), risk falls — even if the hazard stays the same.

This is why development level is the single most powerful predictor of disaster mortality. Low-income countries (LICs) have high vulnerability and low coping capacity. High-income countries (HICs) have lower vulnerability (through better infrastructure and governance) and much higher coping capacity. The physical hazard — the earthquake, the storm — may be identical. The disaster it creates is not.

Applying the Formula: Haiti vs Christchurch

Variable	Haiti 2010	Christchurch 2011
Hazard magnitude	7.0 Mw earthquake	6.3 Mw earthquake
Vulnerability	Very high — poorest country in the Western Hemisphere; most buildings had no earthquake resistance	Low — strict building codes; regularly updated after previous seismic events
Capacity to cope	Very low — earthquake destroyed the government's own offices; limited emergency services	High — well-resourced emergency services; national civil defence infrastructure
Deaths	~316,000	185
Risk outcome	Catastrophic disaster	Major emergency — manageable

Haiti's earthquake was 5 times more powerful than Christchurch's. Its death toll was 1,700 times higher. The risk equation explains this: Haiti's extreme vulnerability and near-zero coping capacity transformed a 7.0 earthquake into one of the worst disasters in modern history.

👥 Factors Affecting Vulnerability: The PEARL Framework

Why are some communities so much more vulnerable to natural hazards than others? Geographers use the PEARL framework to organise the key factors:

P — Poverty
Poor countries cannot afford earthquake-proof buildings, early warning systems, well-equipped emergency services, or comprehensive insurance. When disaster strikes, they lack the financial reserves to fund rapid recovery. Haiti's GDP per capita was approximately $700 in 2010 — compare this to New Zealand's $28,000. Poor households cannot afford to build with reinforced concrete or to relocate away from flood-prone areas.

E — Education
Communities that understand hazard risks can prepare and respond more effectively. Where literacy rates are low, warning messages may not be understood. Where hazard education is not embedded in schools, people do not know to move away from the coast when the sea unexpectedly retreats before a tsunami, or to shelter in place during an earthquake rather than running outside into falling debris.

A — Access
Remote communities are harder to reach with aid and emergency services after a disaster. Nepal's mountain villages after the 2015 earthquake could not be reached for three days because roads were blocked by landslides. In coastal Bangladesh, islands can only be reached by boat — evacuation before a cyclone is slow and dangerous.

R — Resilience
Countries that have experienced frequent hazards and invested in preparedness systems are more resilient. Japan has experienced thousands of earthquakes — its society has built deep cultural and institutional resilience: school drills, building codes, underground flood reservoirs in Tokyo, tsunami walls along the coast. Chile, after the devastating 1960 Valdivia earthquake, reformed its entire construction sector.

L — Location
Some communities have no choice but to live in hazard zones because of economic necessity, fertile soil, or lack of alternatives. Bangladesh's delta is one of the most fertile agricultural areas on Earth — and one of the most flood-prone. The Ring of Fire (the tectonic plate margins around the Pacific Ocean) contains some of the world's most densely populated cities: Tokyo, Manila, Jakarta, Lima, Los Angeles. Over 700 million people live within 100 km of an active volcano.

PEARL: Poverty, Education, Access, Resilience, Location — five factors that determine how vulnerable a community is to natural hazards.

📋 Global Hazard Trends: The Numbers You Need

Knowing global trend data allows you to make evidence-based arguments in longer exam answers. These figures are from EM-DAT (the international disaster database) and UNDRR reports.

Disaster Frequency and Impacts (1970s–2010s)

Decade	Recorded Disaster Events	Deaths	Economic Losses
1970s	~1,000	~2 million	~$550 billion (2011 prices)
1990s	~2,700	~890,000	~$1.2 trillion
2000s–2010s	~3,500	~700,000	~$2.4 trillion

The Three Trends (and Their Explanations)

Trend	Pattern	Explanation
Disaster frequency	Increasing — roughly trebled since the 1970s	Climate change is producing more intense storms, floods, and droughts. But also: better reporting — disasters that would once have gone unrecorded are now captured by satellite and digital news networks.
Death tolls	Generally falling in HICs; remaining high in LICs	Better early warning systems, improved building standards, and stronger emergency services in wealthier countries have dramatically reduced mortality. But 90% of disaster deaths still occur in LICs.
Economic losses	Rising steeply	More valuable infrastructure is being built in hazard zones as cities grow. Higher-income countries suffer higher absolute economic losses — but recover faster. LICs lose a much higher proportion of their GDP, slowing development for decades.

Key Statistics (2000–2019)

7,348 natural disaster events recorded worldwide (EM-DAT)
1.23 million deaths from natural disasters globally in this period
$2.97 trillion in total economic losses
Climate-related disasters (storms, floods, droughts) increased by 83% compared to 1980–1999
4.2 billion people affected by natural disasters (many multiple times) — over half the world's population
The deadliest single decade: the 1970s — when the 1976 Tangshan earthquake (China) alone killed an estimated 240,000–655,000 people

⛓️ Why Is Hazard Risk Increasing? The Five-Step Cause Chain

The number of people exposed to natural hazard risk is rising. Here is the causal chain that explains why:

1. Population growth → more people in all environments
Global population has grown from 3 billion in 1960 to over 8 billion today. More people means more settlements in marginal, hazardous environments — river floodplains, steep hillsides, coastal zones, the flanks of volcanoes — simply because all the "safe" land is already occupied or too expensive.

2. Urbanisation → megacities in hazard zones
Over 55% of the world's population now lives in cities, rising to 68% projected by 2050. Many of the world's fastest-growing megacities sit directly in major hazard zones: Manila (typhoons + earthquakes), Jakarta (flooding + earthquakes + volcanic ash), Istanbul (overdue major earthquake on the North Anatolian Fault), Tehran (earthquakes), and Tokyo (one of the most seismically active cities on Earth). As these cities grow, the number of people exposed to hazards grows with them.

3. Poverty → unable to relocate from hazardous areas
Poor communities often cannot afford to move away from flood plains, unstable hillsides, or volcanic zones. In many LICs, land in hazardous areas is cheaper — attracting the urban poor. After a disaster, the same communities often rebuild in the same locations because they have no financial alternative. This creates a cycle of poverty and vulnerability that is extremely difficult to break.

4. Climate change → more intense and frequent weather hazards
Global average temperatures have risen by approximately 1.1°C since pre-industrial times. This additional energy in the atmosphere is intensifying the hydrological cycle — producing heavier rainfall events, more intense tropical storms, longer droughts, and rising sea levels that increase coastal flood risk. The IPCC (Intergovernmental Panel on Climate Change) projects that extreme weather events will become more frequent and more severe throughout the 21st century.

5. Environmental degradation → destroying natural protection
Deforestation removes tree root systems that bind hillside soil, dramatically increasing landslide risk. Draining wetlands removes natural flood buffers that absorb excess water. Destruction of coastal mangrove forests removes a natural barrier against storm surge and tsunami. Human modification of environments removes the natural defences that once reduced hazard impact.

⚖️ LICs vs HICs: Why the Same Hazard Hits Differently

The most important comparison in natural hazards geography is between low-income countries (LICs) and high-income countries (HICs). The same physical hazard — the same earthquake magnitude, the same category of tropical storm — produces vastly different disaster outcomes depending on which type of country it strikes.

Factor	Low-Income Countries (LICs)	High-Income Countries (HICs)
Building quality	Low — few building codes; codes that exist are rarely enforced; most urban housing built informally with no seismic design. In Haiti 2010, entire apartment blocks collapsed because steel reinforcement had been omitted to cut costs.	High — strict building regulations enforced through planning permission and inspections. New Zealand's earthquake codes require buildings to withstand intense shaking without collapse. Chile's post-1960 codes are among the strictest in the world.
Early warning systems	Limited — few seismometers, limited Doppler radar coverage, unreliable power grids mean warnings cannot be broadcast. Bangladesh has improved its cyclone warning system significantly since the 1991 cyclone (138,000 dead) but many LICs still lack reliable systems.	Advanced — dense networks of seismometers, tide gauges for tsunami detection, meteorological satellites tracking storms 5–7 days ahead. Japan's J-Alert system can send earthquake warnings to all mobile phones within seconds of detecting P-waves.
Emergency services	Under-resourced — limited specialist rescue teams, few helicopters, inadequate medical facilities. After Nepal 2015, search-and-rescue teams from over 30 countries were deployed because Nepal's own capacity was overwhelmed within hours.	Well-equipped and trained — specialist urban search-and-rescue teams, helicopter fleets, well-stocked hospitals. New Zealand's Civil Defence system mobilised trained teams to Christchurch within 90 minutes.
Insurance coverage	Rare — most households and businesses in LICs are uninsured. Without insurance payouts, reconstruction depends entirely on government funds (often depleted by the disaster itself) and international aid, which may be slow and insufficient.	Common — high rates of household and business insurance fund rapid private-sector reconstruction. After the 2011 Christchurch earthquake, insurance covered a significant portion of the $40 billion rebuild.
Governance and institutions	Often weak — corruption may divert reconstruction funds; government institutions may themselves be damaged. After Haiti 2010, Haiti's government buildings (including the president's palace) were among those destroyed, causing governmental paralysis at the moment it was most needed.	Generally strong — capable of coordinating a complex national response, allocating reconstruction budgets, and enforcing rebuilt building codes. Chile's government deployed 14,000 military personnel within 12 hours of the 2010 earthquake.
Death toll pattern	High — 90% of all disaster deaths occur in LICs despite LICs having lower absolute numbers of people in hazard zones. Haiti 2010: ~316,000. Nepal 2015: ~9,000. Typhoon Haiyan (Philippines) 2013: ~6,300.	Low — Christchurch 2011: 185. Chile 2010: ~550. Kobe earthquake (Japan) 1995: ~6,400 — notable as Kobe was a major HIC disaster, but even here recovery was complete within 5 years.
Economic damage pattern	High as % of GDP — Haiti earthquake: losses equivalent to 120% of annual GDP. Nepal earthquake: losses equivalent to ~50% of annual GDP. Recovery takes decades and may never be complete without sustained international support.	High absolute value, low as % of GDP — Chile 2010: $30 billion loss, but only ~18% of GDP. Kobe 1995: $100 billion, but Japan's economy absorbed this within a few years. HICs can borrow, insure, and rebuild.

🛡️ Hazard Management: Reducing Risk Before and After

Understanding why disasters happen is only useful if it leads to action. Geographers and policymakers use several frameworks to think about managing hazard risk. The core principle is that investing in preparedness before a disaster costs far less than responding to a disaster after it strikes. The World Bank estimates that every $1 spent on disaster risk reduction saves $6 in post-disaster recovery costs.

The 4 Cs Framework

Community preparedness
Educating communities about hazard risks; running regular evacuation drills; community early-warning systems (e.g. local sirens, mobile phone alert networks); community hazard mapping. Example: Japan's annual earthquake drills on 1 September (the anniversary of the 1923 Great Kanto Earthquake).

Construction standards
Enforcing building codes that require structures to withstand expected hazard forces; retrofitting existing buildings (especially in earthquake zones); designing infrastructure like roads, bridges and hospitals to remain functional after a hazard event. Example: Chile's strict seismic building codes, credited with saving thousands of lives in 2010.

Contingency planning
Developing and regularly updating emergency response plans; designating and stocking evacuation centres; establishing clear chains of command; pre-positioning emergency supplies in strategic locations. Example: Bangladesh's Cyclone Preparedness Programme maintains over 78,000 trained volunteers who evacuate coastal communities before cyclones strike.

Climate adaptation
Addressing the root drivers of increasing hazard risk — reducing greenhouse gas emissions to slow climate change; restoring natural defences like mangrove forests and wetlands; designing cities to cope with more intense rainfall and heat events. Example: the Netherlands' Delta Programme, which is rebuilding coastal and river flood defences to cope with projected sea level rise.

The Sendai Framework for Disaster Risk Reduction (2015–2030)

The Sendai Framework is the international agreement adopted by UN member states in 2015 to guide global disaster risk reduction. It replaced the earlier Hyogo Framework and runs until 2030. It has four priority areas and seven specific targets, including:

Priority 1: Understanding disaster risk — investing in research, data collection, and knowledge-sharing about hazard patterns
Priority 2: Strengthening disaster risk governance — improving national laws, institutions, and policies on DRR
Priority 3: Investing in DRR for resilience — funding hazard-resistant infrastructure, early warning systems, and livelihood diversification away from hazardous areas
Priority 4: Enhancing disaster preparedness — improving response capabilities and "Build Back Better" approaches to post-disaster reconstruction
Target A: Substantially reduce global disaster mortality by 2030
Target B: Substantially reduce the number of affected people worldwide by 2030
Target G: Substantially increase the availability and access to multi-hazard early warning systems by 2030

The Sendai Framework is significant because it shifts the emphasis from disaster response (acting after events strike) to disaster risk reduction (reducing vulnerability before events occur). This represents a fundamental change in how the international community approaches the hazard-disaster relationship.

Quick Check: Explain the difference between a natural hazard and a natural disaster, using a named example to support your answer.

📖 Key Terms

Natural hazard — A naturally occurring physical event (such as an earthquake, volcanic eruption, tropical storm, or flood) that poses a threat to human life, property, or livelihoods. The event only becomes a hazard when people are at risk; an identical event in an uninhabited area is a natural phenomenon, not a hazard.

Natural disaster — An event that occurs when a natural hazard strikes a vulnerable human population and causes significant loss of life, damage to property, or disruption to society that exceeds the local community's capacity to cope without outside assistance.

Risk — The probability that a natural hazard will cause harm to a specific community. Measured by the formula: Risk = Hazard × Vulnerability ÷ Capacity to Cope. High-risk environments combine a powerful hazard with a highly vulnerable, poorly prepared population.

Vulnerability — How susceptible a population is to the negative effects of a natural hazard. Determined by poverty, building quality, governance, access to healthcare, education level, and geographical accessibility. High vulnerability explains why the same physical event causes far more deaths in a LIC than in a HIC.

Resilience — The ability of a community or society to anticipate, absorb, accommodate, and recover from a natural hazard event with minimum disruption. Built through investment in preparedness, strong institutions, diverse economies, and learning from past disasters.

Tectonic hazard — A natural hazard caused by movement of tectonic plates. Includes earthquakes, volcanic eruptions, and tsunamis. Concentrated along plate boundaries and at volcanic hotspots. The Ring of Fire (around the Pacific Ocean) contains 75% of the world's active volcanoes and generates around 90% of the world's earthquakes.

Atmospheric hazard — A natural hazard caused by extreme atmospheric conditions. Includes tropical storms (hurricanes, typhoons, cyclones), tornadoes, droughts, extreme heat, and extreme cold. Becoming more frequent and intense due to climate change.

Coping capacity — The ability of a community, government, or society to manage the impacts of a natural hazard using available resources, skills, and institutions. High coping capacity (characteristic of HICs) dramatically reduces disaster mortality even when hazard magnitude is large.

Disaster Risk Reduction (DRR) — The systematic approach to identifying, assessing, and reducing hazard risks through preparedness, improved governance, resilient infrastructure, and community education. The international framework for DRR is the Sendai Framework (2015–2030), adopted by 187 UN member states.

Sendai Framework — The international agreement (adopted March 2015, Sendai, Japan) guiding global disaster risk reduction efforts to 2030. Four priorities: understanding risk, strengthening governance, investing in resilience, and enhancing preparedness. Its central target is to substantially reduce disaster mortality and the number of affected people by 2030.

⚠️ Common Misconceptions

Misconception: "A bigger magnitude hazard always causes more deaths."

Reality: Physical magnitude is only one factor in determining disaster impact. Development level, governance quality, and preparedness often matter far more. The Chile 2010 earthquake (8.8 Mw) killed approximately 550 people. The Haiti 2010 earthquake (7.0 Mw) — 32 times weaker — killed approximately 316,000. The 2011 Christchurch earthquake (6.3 Mw) killed 185. The same principle applies across all hazard types: Typhoon Haiyan (2013) killed 6,300 people in the Philippines, where building standards and evacuation capacity were limited. A similarly powerful typhoon hitting Japan would kill a fraction of that number due to Japan's warning systems, typhoon-resistant construction, and practised evacuation procedures.

Misconception: "Natural hazards only threaten poor countries."

Reality: Natural hazards threaten all countries — the United States, Japan, New Zealand, and Australia all experience major hazard events regularly. However, the impact of those hazards as a proportion of deaths and GDP damage is much higher in LICs. Hurricane Katrina (2005) caused around 1,800 deaths in the USA — a wealthy HIC. Cyclone Sidr (2007) caused around 3,400 deaths in Bangladesh — a LIC. Both were powerful storms, but the vulnerability and coping capacity were vastly different. The point is not that HICs are immune to hazards, but that their vulnerability is much lower and their coping capacity much higher.

Misconception: "Because hazard events are increasing, hazard management is failing."

Reality: The increase in recorded disaster events is partly a real trend (climate change intensifying weather hazards) and partly a statistical artefact (better global reporting capturing events that would previously have gone unrecorded). Meanwhile, deaths from natural disasters have actually been falling in many parts of the world as preparedness improves. The Bangladesh cyclone preparedness programme reduced cyclone deaths by over 100-fold: in 1970, Cyclone Bhola killed approximately 500,000 people; in 2007, Cyclone Sidr (a similarly powerful storm) killed 3,400 because early warnings evacuated 3 million people in time. Hazard management is working in many places — the challenge is scaling this to all vulnerable communities globally.

🧠 Memory Aids: PEARL and VERT

PEARL — Factors Affecting Vulnerability

Use PEARL to remember the five factors that make communities vulnerable to natural hazards. These apply to any hazard question asking "why are some communities more at risk?"

P — Poverty: Cannot afford earthquake-resistant buildings, early warning systems, or to relocate
E — Education: Lower awareness of what to do when disaster strikes; cannot act on warnings
A — Access: Remote communities cannot receive emergency aid quickly after a disaster
R — Resilience: Countries with experience and investment in preparedness cope far better
L — Location: Living near fault lines, active volcanoes, coastlines, or floodplains increases exposure

VERT — Factors Affecting Hazard Impact

Use VERT for questions asking "what factors affect the impact of a natural hazard?"

V — Vulnerability of the population (PEARL factors above)
E — Emergency response capacity (quality of emergency services; government capability)
R — Resilience and preparedness (building codes, early warning, drills, community knowledge)
T — Type and magnitude of hazard (physical characteristics of the event itself)

Key Contrasts for Exam Quick Reference

Comparison	LIC Result	HIC Result
Haiti 2010 (7.0 Mw) vs Christchurch 2011 (6.3 Mw)	~316,000 deaths	185 deaths
Nepal 2015 (7.8 Mw) vs Chile 2010 (8.8 Mw)	~9,000 deaths	~550 deaths
Bangladesh Cyclone Bhola 1970 vs Cyclone Sidr 2007	~500,000 deaths (no warning)	~3,400 deaths (3 million evacuated with warnings)

Note: The Bangladesh comparison shows that even within one LIC, investment in preparedness dramatically reduces deaths — the physical hazard was similar; the preparedness was not.

🎯 Exam Connection

Frequency: Natural hazards overview concepts appear in every sitting of OCR B and AQA. The concepts of hazard, risk, vulnerability, and LIC vs HIC comparison appear in at least one question per paper.

Common Question Types

"What is a natural hazard?" — 1 mark: needs a definition that includes the human element
"Explain why some communities are more at risk from natural hazards than others." — 4–6 marks: needs PEARL or equivalent framework with evidence
"Explain why natural hazards have a greater impact in LICs than HICs." — 6 marks: needs comparative framework with named evidence from both LIC and HIC
"Assess how the impact of natural hazards can be reduced." — 6–8 marks: needs range of management strategies with evaluation of effectiveness

Moving from Level 1 to Level 3: The LIC vs HIC Question

Question: "Explain why natural hazards have a greater impact in LICs than in HICs." (6 marks)

Level 1 response (1–2 marks): "In LICs people don't have as much money so they can't prepare for hazards as well. HICs have better buildings and emergency services."

Problem: vague, no evidence, no causal explanation of the mechanisms.

Level 2 response (3–4 marks): "LICs have greater hazard impacts because they cannot afford earthquake-resistant buildings, so more people die when earthquakes occur. They also have fewer emergency services. The 2010 Haiti earthquake (magnitude 7.0) killed approximately 316,000 people because buildings were poorly constructed. In contrast, HICs like New Zealand have strict building codes and fast emergency response."

Better: specific evidence, some causal reasoning. But only one factor developed.

Level 3 response (5–6 marks): "LICs experience greater hazard impacts due to multiple interconnected factors. Building quality in LICs is typically low — few have the institutional capacity to enforce seismic construction codes, and residents cannot afford reinforced structures. This was catastrophically demonstrated in Haiti 2010 (7.0 Mw, ~316,000 deaths), where entire apartment blocks collapsed because steel reinforcement had been omitted to reduce costs. This contrasts sharply with Christchurch 2011 (6.3 Mw, 185 deaths) — a weaker earthquake, but one that struck a country with strictly enforced construction codes. Furthermore, economic recovery from disasters is far slower in LICs: without widespread insurance and limited government fiscal reserves, reconstruction can take decades. After Haiti 2010, cholera outbreaks in contaminated water killed a further 10,000 people — indirect mortality that would not have occurred in a country with functioning water infrastructure. Critically, the capacity to cope is not just about wealth but also governance: Haiti's earthquake destroyed its own government buildings, causing administrative paralysis at the very moment effective coordination was most essential."

Level 3: multiple factors developed, causally linked, with specific named evidence and a closing analytical point about interconnection.

Key Command Words for This Topic

Command Word	What It Requires
Define / What is...	A precise definition including the human vulnerability element — "a natural event that threatens human life or property"
Explain why	Causally linked reasoning: not just WHAT happens but WHY each factor leads to greater impact. Use "because", "which means that", "as a result"
Compare	Direct contrasts using named evidence from both sides — LIC and HIC examples with specific statistics
Assess / Evaluate	Judge the relative importance of factors. "The most significant factor is X because... However, Y also matters because..."

💡 Exam Tips for Natural Hazards Overview

🎯 Common Question Types:

"What is a natural hazard?" (1–2 marks) — always include the human vulnerability element
"Explain why natural hazard risk is increasing." (4–6 marks) — use the 5-step cause chain: population growth → urbanisation → poverty → climate change → environmental degradation
"Explain why natural hazards have a greater impact in LICs than HICs." (6 marks) — the PEARL framework with named evidence from Haiti, Nepal, Christchurch, Chile
"Assess how the impact of natural hazards can be reduced." (6–8 marks) — compare management strategies; evaluate which are most effective and for whom

📝 Key Command Words:

Define: Include the word "threat" and the human element — not just "a natural event"
Explain: Every factor needs a causal chain — "poverty means buildings are poorly constructed, WHICH MEANS more people die when earthquakes occur"
Compare: Use explicit contrast language — "whereas", "in contrast", "compared to"
Assess: Make a judgement — identify the most significant factor and justify it

⚠️ Common Mistakes to Avoid:

Defining a natural hazard without the human element — "a natural event" alone is not enough
Saying "HICs have better buildings" without explaining WHY — enforcement of codes, ability to afford construction materials, institutional governance
Giving a vague LIC vs HIC answer without any named evidence — you must name Haiti, Nepal, Christchurch, Chile, or similar
Confusing hazard and disaster — the question may specifically ask about "disasters" (when humans are harmed) not just "hazards"
Treating physical magnitude as the only factor — the entire point of this topic is that magnitude alone does not determine impact
Listing factors without explaining how they connect — examiners reward causal linking ("this means that", "as a result", "which leads to")

Quick Check: Using the hazard risk equation (Risk = Hazard × Vulnerability ÷ Capacity to Cope), explain why Haiti experienced a greater disaster than Christchurch despite a weaker earthquake occurring in New Zealand.

Quick Check: Give THREE reasons why natural hazard risk is increasing globally.