🏘️ Nepal 2015: When Vulnerability Turns Hazard into Disaster
Nepal sits between two enormous tectonic forces. The Indian Plate has been crashing into the Eurasian Plate for around 50 million years, pushing up the Himalayas — the world's highest mountain range — and generating earthquakes that have repeatedly devastated the region. Nepal is one of the poorest countries in Asia, with a GDP per capita of around $700 in 2015. It has very limited resources to prepare for or respond to the tectonic hazards that its geography makes inevitable.
The Event
At 11:56 on Saturday 25 April 2015, a magnitude 7.8 Mw earthquake struck with its epicentre 77 km north-west of Kathmandu, Nepal's capital and most densely populated city. The earthquake was shallow — just 15 km below the surface — which intensified the shaking at ground level. The timing, on a Saturday morning, meant that schools were empty (schools in Nepal run Monday–Friday), which reduced casualties among children. Had it struck on a school day, the death toll would have been significantly higher.
Primary Effects
Approximately 9,000 people killed — 16 times more than Chile despite being 32 times less powerful
Around 22,000 people injured
Over 600,000 houses completely destroyed; a further 300,000 damaged — total 900,000 structures affected
2.8 million people displaced from their homes
Entire villages in remote mountain districts such as Gorkha, Sindhupalchok and Nuwakot were completely destroyed
Ancient heritage sites in the Kathmandu Valley — including the UNESCO World Heritage-listed Dharahara tower (built 1832) and temples in Durbar Square — collapsed entirely
Total economic damage estimated at $10 billion — approximately 50% of Nepal's entire annual GDP
Mount Everest base camp was struck by an avalanche triggered by the earthquake, killing 19 people and injuring dozens of mountaineers
Secondary Effects
Hundreds of landslides across the mountain terrain, blocking roads and valleys and burying villages
Landslides created natural dams across rivers, raising the risk of glacial lake outburst floods which could have caused additional mass casualties downstream
Disease risk from contaminated water supplies in destroyed communities, particularly in remote areas without access to clean water
Over 150 aftershocks in the first month, including a major 7.3 Mw aftershock on 12 May 2015 that killed a further 200 people and triggered new landslides
Nepal's tourism industry — the country's largest source of foreign income — collapsed for the 2015 season, with climbers evacuated from Everest and trekking routes closed
A mental health crisis emerged in the months following the earthquake, with large numbers of survivors — particularly children — experiencing trauma, anxiety and PTSD
Long-term economic disruption as reconstruction stretched government resources and aid was slow to reach remote communities
Immediate Responses
The Nepalese government declared a state of emergency and appealed immediately for international assistance
India sent 16 aircraft and over 1,000 rescue workers within 24 hours — the fastest international response
The UK pledged £73 million in emergency and long-term aid
The UN coordinated a global humanitarian response; over $400 million was pledged within the first week
However, Nepal's infrastructure severely limited the response: only one major road connects Kathmandu to the rest of the country; Kathmandu's airport could not handle the volume of incoming aid flights; and approximately 60% of Nepal's terrain is only accessible on foot
Rescue teams could not reach many remote mountain villages for 72 hours or more after the earthquake — by which point the critical survival window of 72 hours had passed for many trapped survivors
Military helicopters rescued over 4,000 climbers and trekkers stranded on mountain routes
Long-Term Responses
The government established the National Reconstruction Authority (NRA) in December 2015 — seven months after the earthquake — to coordinate rebuilding
However, progress was extremely slow: three years after the earthquake, hundreds of thousands of families were still living in temporary shelters
Concerns were raised about corruption and mismanagement in aid distribution, with some communities reporting they had received little or no support
A "build back better" approach was promoted, encouraging reconstruction using local stone (traditional material) but with improved earthquake-resistant foundations — yet enforcement was inconsistent
Nepal's remote terrain meant that reconstruction costs were far higher per household than in an accessible country
Heritage reconstruction began at Kathmandu's UNESCO sites, but the Dharahara tower was not fully rebuilt until 2021 — six years after its collapse
Why Deaths Were So High
Unreinforced brick and stone construction — Traditional Nepali housing uses brick, stone and timber with no steel reinforcement. This construction fails catastrophically in earthquakes. In contrast to Chile's reinforced concrete frame buildings, Nepal's housing stock was essentially designed for the climate, not for seismic events. Even where building regulations existed on paper, enforcement was almost non-existent in rural areas.
Extreme poverty and lack of resources — Nepal's GDP per capita of ~$700 meant the government simply did not have the funds to retrofit buildings, train large numbers of emergency responders, or stock significant emergency supplies. There was one doctor per 4,000 people in 2015. Compare this to Chile's well-funded hospitals that remained fully functional throughout the crisis.
Remote mountain terrain — Approximately 60% of Nepal's land area is mountainous and inaccessible by road. When earthquakes trigger landslides that block the few roads that do exist, entire districts become completely cut off. This meant the 72-hour survival window had already passed by the time rescue teams reached many communities.
Result: a much weaker earthquake caused a far greater disaster — because physical hazard interacts with human vulnerability to determine the actual scale of harm. Nepal's physical exposure was unavoidable; its vulnerability was not.
