Everest's Deadliest Days: 1996 Storm, 2014 Icefall, 2015 Avalanche

Since Nepal opened its peaks to foreign expeditions in 1949-50, Mount Everest (Sagarmatha, सगरमाथा, 8,848.86 m) has drawn more climbers, and more scrutiny, than any mountain on Earth. Through December 2025 the Himalayan Database records 339 deaths on Everest against roughly 13,700 summits. Most are individual accidents, but a handful of catastrophic days, in 1996, 2014 and 2015, reshaped how the world thinks about high-altitude climbing, the Sherpa workforce that makes it possible, and the risks that no permit fee can remove.

The searches that bring readers here, '1996 Everest disaster', 'khumbu icefall 2014', 'Everest 2015 avalanche deaths', and 'Everest traffic jam deaths', point to five episodes that define the modern era, and this page gives each a dated, sourced entry. A recurring theme runs through all of them: the deadliest events on Everest are rarely caused by summit-day heroics gone wrong alone. They are driven by weather that turns without warning, by unstable ice on the approach, and, in 2015, by a magnitude 7.8 earthquake more than 200 kilometres away, and the people most exposed are often Nepali high-altitude workers who spend far more time in the danger zones than the clients they guide.

On 10-11 May 1996 a sudden blizzard trapped commercial expeditions high on Everest as they descended from the summit, and eight climbers died in a single night, then the deadliest episode in the mountain's history. Across the whole spring 1996 season about fifteen people died on Everest (from both the Nepal and Tibet sides), making it the deadliest season up to that point. The dead of 10-11 May came mostly from two guided teams that had summited during an apparent lull before the storm returned in full force.

Rob Hall's New Zealand-based Adventure Consultants lost four people: Hall himself (the expedition leader), guide Andy Harris, and clients Doug Hansen and Yasuko Namba. Scott Fischer, leader of the Seattle-based Mountain Madness team, also died. On the north (Tibet) side, three members of an Indo-Tibetan Border Police team, Tsewang Samanla, Dorje Morup and Tsewang Paljor, perished the same night. Wind chills reached around minus 51 degrees Celsius and winds exceeded 100 km/h, reducing the upper mountain to a whiteout.

Survivors identified a chain of failures rather than one cause: forecast storms that went unheeded, missed turnaround times that left climbers high on the mountain after midday, bottlenecks at the Hillary Step and fixed-rope sections, and commercial pressure to deliver summits to paying clients. The disaster became the most documented event in climbing history, chronicled in Jon Krakauer's 'Into Thin Air' (1997) and Anatoli Boukreev's rebuttal 'The Climb' (1997). It forced the industry's first hard reckoning with guided mountaineering, and made 'turnaround time' a rule most reputable operators now enforce.

At about 06:45 local time on 18 April 2014 (5 Baishakh 2071 BS), a massive block of ice broke from Everest's western shoulder and swept down through the Khumbu Icefall at roughly 5,800 metres, killing sixteen Nepali high-altitude workers. It was, at the time, the single deadliest day in Everest's history. The victims were part of a group of about twenty-five men, mostly Sherpas, who were ferrying loads and fixing ropes to prepare the South Col route for the season's fee-paying clients.

The Khumbu Icefall is the most feared section of the standard Nepal-side route: a chaotic river of shifting ice between Base Camp and Camp 1, laced with crevasses and towering seracs that can collapse without warning. The 2014 serac was later estimated at around 14,000 tonnes. Thirteen bodies were recovered within about forty-eight hours before rescue efforts were halted as too dangerous; three victims were never recovered, entombed in the glacier. Because Nepali staff cross the Icefall dozens of times each season to stock the higher camps, they bear a hugely disproportionate share of Everest's risk.

The aftermath was as significant as the disaster. Nepali workers were outraged that the government initially offered only about 40,000 rupees (roughly USD 400) per family in compensation; after protests this was raised to 500,000 rupees (about USD 5,100). On 22 April the Sherpa community announced a boycott of the rest of the 2014 season, both to mourn and to press demands over pay, insurance and treatment. Most commercial expeditions cancelled, and only about 106 climbers summited Everest in 2014, against 658 in 2013. From 2015, mandatory insurance cover for high-altitude workers was increased, a direct, if partial, response to the tragedy.

On the afternoon of 25 April 2015 (12 Baishakh 2072 BS), a magnitude 7.8 earthquake struck near Gorkha, roughly 220 kilometres west of Everest. The shaking dislodged a huge avalanche off the flank of Pumori (7,161 m), which roared down and blasted through Everest Base Camp, hurling tents and people across the Khumbu Glacier toward the lower Icefall. At least nineteen people were killed and dozens injured, making it the deadliest single day, and the deadliest single accident, in Everest's recorded history.

The Nepal Mountaineering Association's tally of nineteen dead at Base Camp included around ten Nepali workers and several foreign climbers and staff, among them a Google executive, Dan Fredinburg. Wider counts that add later hospital deaths and additional bodies put the toll at up to about twenty-two to twenty-four. Between 700 and 1,000 people were on or near the mountain when the quake hit, including some 359 climbers at Base Camp, many of whom had returned after the aborted 2014 season. An Indian Army mountaineering team recovered bodies from the South Base Camp and helped rescue climbers stranded above the shattered Icefall, who could not descend until they were flown out by helicopter.

The Base Camp disaster was only a fraction of the catastrophe unfolding below. The same Gorkha earthquake, and its major aftershock on 12 May, killed roughly 9,000 people across Nepal and devastated the Kathmandu Valley's heritage. Everest's 2015 season was cancelled outright, the second lost season in a row after 2014. For a full account of the earthquake itself, see our earthquakes coverage and the companion page on how Nepal rebuilt its earthquake-damaged heritage after 2015.

Everest is not Nepal's only mountain to suffer mass-casualty days. At about 04:30 on 23 September 2012 (7 Ashoj 2069 BS), a serac released above Camp 3 on Manaslu (8,163 m), the world's eighth-highest peak in Gorkha district, triggering a slab avalanche that swept directly into the camp and battered Camp 2 with a wind blast. Eleven climbers were killed, most of them asleep in their tents, in what remains one of the deadliest single incidents on any Nepali eight-thousander outside Everest.

The victims came from several countries, including Nepal, Spain, Italy, Germany and France, reflecting Manaslu's rise as the busiest commercial 8,000er after Everest, especially after China restricted access to Cho Oyu on the Tibet side. Around ten other climbers were caught but survived. The disaster underlined that the seracs and loaded slopes that threaten Everest's Khumbu Icefall are a hazard across the high Himalaya, and that popularity concentrates people in exactly the places avalanches strike. Manaslu suffered further avalanche deaths in 2022, reinforcing the pattern.

The tragedies of 2019 were of a different kind: not one catastrophic event, but a season in which overcrowding became lethal. At least eleven people died on Everest that spring, the deadliest season in four years, after Nepal issued a record 381 climbing permits (and a similar number to guides and Sherpas). A photograph taken on 22 May 2019 by Nepali climber Nirmal 'Nimsdai' Purja, showing a near-continuous queue of hundreds of climbers strung along the summit ridge, went viral worldwide and became the defining image of the overcrowding debate.

The mechanism behind 'Everest traffic jam deaths' is exhaustion and exposure rather than a single falling serac. When a narrow window of good weather funnels scores of climbers onto the same fixed ropes, delays force people to wait for hours in the death zone above 8,000 metres, where supplemental oxygen runs low and the body deteriorates rapidly. Alan Arnette, who tracks Everest statistics from the Himalayan Database, estimated that around five of the eleven 2019 deaths may have been related to the crowds; other guides argued the queues were a symptom of deeper problems, chiefly inexperienced clients and under-resourced operators, rather than the direct cause.

The 2019 season crystallised long-running concerns about permit numbers, minimum-experience rules and operator standards. It fed directly into later policy: Nepal's April 2025 law and the permit schedule effective 1 September 2025 raised the spring Everest royalty to USD 15,000, banned solo climbs, required a certified Nepali guide, and introduced a prerequisite that climbers first summit a 7,000-metre peak in Nepal, all aimed at thinning the field of the least-prepared.

Read together, Everest's worst days reveal three distinct killers. Weather (1996) can trap experienced climbers at the worst moment; unstable ice (2014 Khumbu, 2012 Manaslu) can strike the fittest workers on the approach without warning; and external geology (2015) can turn the safest part of the mountain, Base Camp, into the deadliest. The 2019 season adds a fourth, human factor: sheer numbers extending the time people spend where survival is measured in hours. The statistics frame the human toll. Through December 2025 the Himalayan Database records roughly 339 deaths on Everest against about 13,700 summits, a fatality rate near one death per hundred summits, low by the standards of peaks like Annapurna but sobering given how many people now climb. Crucially, Nepali high-altitude workers absorb a disproportionate share of that risk: it was sixteen of them, not clients, who died in the Khumbu Icefall in 2014, and roughly half the 2015 Base Camp dead were Nepali staff.

The aftermaths bent policy toward the people most exposed. The 2014 disaster forced higher compensation and insurance for high-altitude workers; the back-to-back cancelled seasons of 2014 and 2015 reset expectations about risk; and 2019's crowds drove the 2025 experience prerequisite and fee rise. None of these measures makes Everest safe, the Icefall and the death zone remain what they always were, but each was written in the memory of a specific deadly day. For the broader mountaineering story, our peaks pages profile each eight-thousander; for the 2015 earthquake behind Everest's deadliest day, see the dedicated earthquakes coverage.