Everest Safety & Fatality Statistics
Complete historical death data, cause breakdowns, seasonal analysis, and comparisons with other 8,000m peaks — updated through the 2025 season.
At-a-Glance Safety Stats (Updated Through 2025)
Mount Everest has claimed more than 340 lives since the first serious attempts in 1922. Yet it is statistically safer than most people assume — and far safer than several of its 8,000m neighbors. Below is the most current compiled data available.
| Category | Data |
|---|---|
| Total deaths (1922–2025) | ~340–344 (sources vary slightly by methodology) |
| Bodies unrecovered | ~200–250 remain on the mountain |
| Overall death rate above Base Camp | Approximately 1–1.2% |
| Death rate 1923–1999 | ~14.5% — dramatically higher than modern era |
| Death rate 2000–2025 | Approximately 1.3% |
| Average deaths per year (all-time) | ~5 per year since 1922 |
| Average deaths per year (2010–2024) | ~8 — elevated by outlier years (2014, 2015, 2023) |
| Deaths in 2025 | 5 total (3 above Base Camp, 2 at Base Camp) |
| Deaths in 2024 | 8 total |
| Deaths in 2023 | 18 — one of the deadliest seasons on record |
| All-time total summits | 13,737 (43% all-time success rate) |
| Unique individuals who have summited | 7,563 |
| 2025 women’s summit success rate | 76% |
| 2025 men’s summit success rate | 56% |
Source: Himalayan Database, December 2025 update. Exact totals vary slightly by dataset and reporting method.
Annual Death Totals: Key Seasons
Not all Everest seasons are equal. Single catastrophic events — an icefall avalanche, a serac collapse, a severe storm — can dramatically distort annual totals. Understanding which years were outliers vs. representative provides important context.
| Year | Deaths | Primary Cause / Context |
|---|---|---|
| 1996 | 15 | Severe storm — 8 deaths in a single day; basis for Into Thin Air |
| 2014 | 19 | Khumbu Icefall avalanche — killed 16 Nepali guides in one event |
| 2015 | 19+ | Nepal earthquake triggered massive Base Camp avalanche |
| 2016 | 7 | Post-earthquake season; Icefall Doctors rerouted; low traffic |
| 2019 | 11 | Overcrowding and bottlenecks at Hillary Step — death zone queue deaths |
| 2022 | 3 | Exceptionally low; favorable weather window throughout season |
| 2023 | 18 | One of the deadliest seasons on record — overcrowding and poor conditions |
| 2024 | 8 | Hillary Step cornice collapse killed 2; several bottleneck-related deaths |
| 2025 | 5 | Three above Base Camp; two at Base Camp from medical events |
Everest has become measurably safer since 2000 despite dramatically higher traffic volumes. The primary driver is improved infrastructure: more Sherpas, better oxygen logistics, faster helicopter rescue capability, and more experienced commercial expedition management. However, crowded years (2019, 2023) show the safety floor can break down under congestion pressure.
Causes of Death: Breakdown
No single cause dominates Everest fatalities. Most deaths are multi-causal — altitude illness compounds exhaustion, exhaustion leads to poor decisions, poor decisions mean climbers descend in the dark. The table below reflects best-available analysis from the Himalayan Database and peer-reviewed mountaineering medicine research.
| Cause | Estimated Share | Notes |
|---|---|---|
| Altitude sickness (AMS / HAPE / HACE) | 30–40% | Primary cause above 7,000m; often combined with exhaustion |
| Avalanche / serac collapse | ~25% | 2014 and 2015 alone account for 35+ deaths from this cause |
| Falls and slips | 25–30% | Steep ice, fatigue, poor visibility; Hillary Step area is high-risk zone |
| Exhaustion and cardiac events | 10–15% | Sharply elevated in the death zone above 8,000m |
| Exposure / hypothermia | ~10% | Frequently combined with other primary causes |
| Crevasse falls | ~5% | Primarily in the Khumbu Icefall section |
| Bottleneck / oxygen depletion in queue | Emerging | Documented pattern in 2019, 2023, 2024 — increasingly tracked |
Route-Specific Fatality Distribution
| Route | Share of All Summits | Share of All Deaths | Context |
|---|---|---|---|
| Southeast Ridge (Nepal, standard) | ~57% of summits | ~57% of deaths | Death share roughly matches summit share — risk is proportional |
| Northeast Ridge (Tibet) | ~42% of summits | ~22% of deaths | Proportionally fewer deaths; smaller traffic volume |
| Non-standard / alternative routes | ~1.4% of summits | ~21% of deaths | Only 187 non-standard ascents, but disproportionate fatality share |
Source: Himalayan Database aggregate through 2025.
Ascent vs. Descent: When Risk Is Highest
A common misconception is that reaching the summit is the most dangerous moment. Research tells a more nuanced story — and the answer depends significantly on which data set you use.
- A 2020 PLOS ONE study (1921–2006 data) found approximately 62% of fatalities occurred during ascent or route preparation, 38% on descent.
- The Himalayan Database long-form dataset (1922–2023) reports that approximately 56% of fatalities above Base Camp occurred during descent — particularly on summit day.
- The discrepancy reflects methodology. Avalanche deaths during route preparation pull ascent numbers higher. Summit-day deaths, skewed by exhaustion and depleted oxygen, pull descent numbers higher.
- The most useful planning insight: most climbers who die above Camp 4 on summit day die on the descent, not the ascent.
Turning around from a summit attempt by 2pm — regardless of how close the summit appears — exists because most weather deterioration and oxygen emergencies happen on the descent, not the ascent. Violating the 2pm rule dramatically increases exposure time in the death zone during the most dangerous part of the day. On Everest, the summit is halfway — not the finish line.
Oxygen Depletion and the Cost of Delays
Most Everest climbers use supplemental oxygen at a flow rate of 2–4 L/min on summit day. A standard cylinder lasts 3–7 hours depending on flow rate. A 90-minute queue at the Hillary Step at 8,790m represents 25–50% of a cylinder’s remaining supply consumed while standing still. The table below shows the math:
| Flow Rate | Cylinder Duration | Impact of 90-Min Queue |
|---|---|---|
| 2 L/min (standard climbing) | 5–7 hours | 15–18% of total supply consumed standing still |
| 3 L/min (active summit push) | 3–4 hours | 37–50% of total supply — critical risk threshold |
| 4 L/min (emergency/altitude stress) | 2.5–3 hours | Any significant queue at this rate is potentially fatal |
Everest vs. Other 8,000m Peaks: How Safe Is It Really?
Everest is not the deadliest 8,000m mountain. When measured by fatality-to-summit ratio — deaths per 100 successful summits — it ranks approximately 10th on the list. Its high absolute death toll is a function of its commercialization and total attempt volume, not uniquely dangerous terrain.
| Mountain | Elevation (m) | Deaths per 100 Summits | Relative Danger |
|---|---|---|---|
| Annapurna I | 8,091 | ~32 per 100 summits | Highest ratio among 8,000m peaks |
| K2 | 8,611 | ~23 per 100 summits | Extreme technical difficulty; poor rescue access |
| Nanga Parbat | 8,126 | ~22 per 100 summits | Historically lethal; remote rescue environment |
| Kangchenjunga | 8,586 | ~20 per 100 summits | Long, serious route; limited commercial infrastructure |
| Dhaulagiri | 8,167 | ~14 per 100 summits | Technical approaches; less supported logistics |
| Makalu | 8,485 | ~12 per 100 summits | Serious technical challenge; few guided programs |
| Mount Everest | 8,848 | ~1–2 per 100 summits | Lowest ratio among 8,000m peaks |
Everest’s lower fatality-to-summit ratio is largely a product of its commercialization. No other 8,000m peak has as much fixed-rope infrastructure, as many experienced Sherpas, as extensive oxygen logistics, or as reliable helicopter rescue capability. The death zone is still lethal — but the support structure is the best in the world at this altitude.
What the 2025 Season Revealed About Risk
The 2025 spring season saw 851 successful summits — the third-busiest season ever — with only 5 deaths, making it one of the safer high-volume seasons on record. Several patterns emerged that are directly useful for planning.
Key Safety Findings from 2025
- A condensed summit window (around May 18–19) reduced the total time inexperienced climbers spent in the death zone — reducing exposure risk across the season.
- Helicopter rescues from Camp 3 and below were credited with preventing additional fatalities. Above approximately 7,300m, helicopters cannot reliably operate.
- Cost and safety are correlated. In 2023 and 2024, 23 of 26 Everest fatalities occurred on expeditions priced below the median cost. Budget operators may reduce Sherpa ratios, provide fewer oxygen cylinders, and have weaker turnaround protocols.
- The 2024 Hillary Step cornice collapse (4 missing/killed) reinforced that overloading narrow summit sections with simultaneous traffic creates independent hazards beyond individual fitness or skill.
- Women’s summit success rate (76%) exceeded men’s (56%) for the second consecutive year — reflecting more careful operator selection and more conservative decision-making patterns among women participants on guided expeditions.
If an Everest expedition price seems dramatically lower than peer offerings, ask specifically: What is the Sherpa-to-client ratio? How many oxygen cylinders per climber? What is the turnaround policy at 2pm if you have not yet summited? The answers to these questions reveal the safety reality behind the price difference more than any marketing language.