Switzerland's natural glaciers are retreating and collapsing at an accelerating rate, and new data paint a worrying picture of the Alps' ice. According to the latest report from the Swiss Glacier Monitoring Network (GLAMOS) and the Swiss Cryosphere Monitoring Conference, the country's glaciers lost about 5 percent of their volume in 2026. That figure brought the total loss by 2021 to 19.4 percent.
This occurred while the summer of 2026 was one of the warmest and driest periods recorded in Switzerland. Extreme heat, reduced snowfall in winter, and intense sunshine created conditions that have undermined the survival of smaller glaciers.
According to the published data, in just the first eight months of 2026, the volume of Switzerland's glaciers decreased by 5.5 percent - a figure approaching what was recorded in 2022. However, the estimated total loss for the whole year is about 5 percent.
Glaciers are not just melting from the surface
One worrying aspect of this trend is the changing manner in which glaciers are collapsing. Scientists say that in some areas, glaciers are not merely retreating from their surfaces and edges, but internal destruction is also occurring.
Matthias Haas, a glaciologist at ETH Zürich, explains that internal water flow can create large cavities. As these cavities expand, parts of the glacier structure are weakened from within and the roofs of these spaces collapse. As a result, the ice mass disintegrates more rapidly and its retreat accelerates.
Some smaller glaciers have also disappeared, but not all losses are completed in a single year. Areas that were once covered by thick layers of ice have now in some places become bare rock.
One notable example is the Plattalva Fren glacier, also known as the Griess Glacier. This glacier, which once covered a large part of a mountain slope, has lost about 99 percent of its area over roughly two decades. This site has been one of the important locations for precise glacier monitoring since the 1950s and was worked on during a doctoral study using its data.
Why wasn't the 2022 record broken this year despite greater heat?
Although the summer of 2026 was warmer than the record-breaking summer of 2022, the amount of ice melt in Switzerland remained only slightly below that year's record. Part of this difference has been attributed in the data to natural factors related to snow.
Reduced influx of dust from the Sahara resulted in cleaner snow and thus more of it reflecting sunlight. Snow cover was also slightly greater at the end of winter, which partly mitigated the effect of the intense summer heat.
However, the overall trend is worrying. Official GLAMOS data show that 2026 will also be added to the list of years that have significantly reduced Switzerland's stored ice. The network published the annual mass-balance report of Switzerland's glaciers for 2026 and the winter snow accumulation report on October 1.
According to The Guardian, Europe is currently warming at about twice the global rate and is one of the regions experiencing the impacts of these changes very intensely. New reports about Switzerland indicate that climate change is not limited to rising temperatures and is directly altering the face of one of Europe's most important glaciated regions.