Switzerland’s glaciers have entered a critical phase of decline. A new report released by ETH Zurich and the Swiss Glacier Monitoring Network (GLAMOS) reveals that the country’s glaciers lost nearly 3 percent of their total ice volume this year alone — one of the worst melting seasons ever recorded. Scientists warn that more than 1,000 glaciers have already disappeared, signaling that the nation’s alpine ice is melting faster than previously predicted.
The winter of 2024–2025 was exceptionally warm and dry, with snowfall levels far below normal. According to ETH Zurich researchers, the six-month period from October to March ranked among the three warmest winters on record. By April, snow depth in many glacier regions was 13 percent below the long-term average, leaving glaciers exposed and vulnerable before summer even began.
Then came a scorching summer. In June, temperatures surged across the Alps, pushing the freezing line above 5,000 meters at times — a level rarely reached even in recent decades. Although July brought temporary relief, August reignited melting, and brief cold fronts failed to rebuild lasting snow cover. These combined extremes created a perfect storm that led to massive ice losses throughout the country.
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Historic Ice Loss and Vanishing Glaciers
According to GLAMOS data, Swiss glaciers lost around 3 percent of their total ice volume in 2025, making it the fourth worst year for glacial retreat since monitoring began — surpassed only by 2022, 2023, and 2003. Since 2015, Switzerland has lost roughly a quarter of its total glacier volume.
Smaller glaciers are disappearing altogether. Over 1,000 small glacier bodies have vanished in recent years, with many others now on the brink of collapse. The Claridenfirn in Glarus, the Plaine Morte Glacier, and the Silvretta Glacier in Grisons each lost more than two meters of ice thickness this year alone. Larger glaciers in Valais, including the Allalin and Findel, lost around one meter.
The losses are most severe at elevations below 3,000 meters, where the lack of snow insulation accelerated melting. In some regions, even the mountain peaks were stripped bare of snow, leaving glacial ice directly exposed to the sun for months.
“These conditions are unprecedented,” said Matthias Huss, head of GLAMOS at ETH Zurich. “The lack of snow in winter and extreme summer heat have caused losses comparable to the worst years on record. We are witnessing the long-term disappearance of ice that has existed for centuries.”
Changing Alpine Landscapes
The disappearance of glaciers is dramatically reshaping Switzerland’s mountain landscapes. The once-mighty Rhone Glacier continues to retreat rapidly, its newly formed lake expanding year by year. Smaller glaciers, such as Vadret da Triazza in Grisons, have vanished entirely.
The visual transformation is striking: where gleaming ice fields once lay, bare rock and debris now dominate. These shifts are also destabilizing the terrain. As glaciers retreat, the structural support they once provided to surrounding rock walls is lost, increasing the risk of rock and ice avalanches.
One such disaster struck earlier this year, when a rock-ice avalanche partially buried parts of Blatten village in the Lötschental Valley. Scientists warn that more such events are likely as permafrost — the frozen ground that cements mountain slopes — continues to thaw.
Switzerland’s monitoring network, coordinated by the Swiss Commission for Cryosphere Observation (SCC), integrates glacier, snow, and permafrost data. The findings highlight how the country’s entire cryosphere — its frozen environment — is destabilizing under climate change.
“Each of these years of extreme melting brings us closer to a point of no return,” said Huss. “Even if temperatures stabilize, many glaciers are now too small to recover.”
The loss of glacier ice is not only an environmental concern but also a socio-economic one. Glaciers play a vital role in regulating water supply for agriculture, hydropower, and ecosystems across the Alps. As they vanish, river flow patterns change, increasing the risk of droughts in summer and floods during heavy rainfall.
To track these changes, GLAMOS and ETH Zurich conduct continuous measurements across the Alps. Their monitoring program, supported by the Swiss Academy of Sciences (SCNAT), has become one of the world’s most comprehensive glacier observation systems.
The data collected is critical for assessing risks, planning infrastructure, and guiding adaptation strategies. Swiss authorities have already launched initiatives to protect critical zones, stabilize mountain slopes, and improve early warning systems for avalanches and floods.
However, local adaptations cannot substitute for global climate action. “We can build walls or cover glaciers with protective fabric, but these are symbolic gestures,” Huss noted. “The only real solution is to reduce greenhouse gas emissions drastically.”
The Future of Switzerland’s Glaciers
The outlook remains grim. Scientists estimate that if current warming trends continue, most of Switzerland’s low-altitude glaciers will vanish within the next 20 to 30 years. Larger glaciers at higher elevations may persist longer but will continue to thin and fragment.
The nation’s glaciers have already lost about 25 percent of their volume in just a decade, a pace that underscores how quickly the effects of global warming are accelerating. “We are moving from a landscape dominated by ice to one defined by rock and lakes,” said Huss. “Future generations will only know these glaciers through photographs.”.
For the Swiss Alps — often described as Europe’s water tower — the implications are profound. The loss of glaciers affects not only local ecosystems and tourism but also Europe’s broader hydrological balance.
The crisis unfolding in Switzerland mirrors a global trend. From the Himalayas to the Andes, mountain glaciers are retreating at alarming rates, threatening freshwater supplies for millions of people. The Swiss experience serves as a warning for the rest of the world: even in one of the most closely monitored and scientifically advanced regions, the forces of climate change are proving overwhelming.
“The Swiss Alps have long been a symbol of natural beauty and stability,” ETH Zurich said in a statement. “Now they stand as a stark reminder of how quickly that stability can disappear.”
Unless global emissions are reduced significantly in the coming decade, scientists predict that by the end of the century, most of the glaciers in the Alps will be gone — transforming not only Switzerland’s iconic mountain scenery but also its way of life. (Wage Erlangga)
