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Record Melt Threatens Swiss Water Supplies
1 Oct
Summary
- Swiss glaciers experienced over 5% ice loss in the last 12 months.
- Intense heatwaves accelerated melting to unprecedented levels.
- Threatened water supplies for farming, hydropower, and transport.
Swiss glaciers have experienced a near-record loss of ice in 2026, with over 5% of their volume disappearing in the last 12 months. Scientists have described this rate of melting as "extraordinary" and "disastrous," far exceeding previous understandings of extreme annual ice loss.
The accelerated melting is largely attributed to intense and early summer heatwaves in May and June. These conditions exposed glacier ice, which absorbs more solar energy than snow, leaving the glaciers highly vulnerable to further melt.
This rapid decline in glacier mass, occurring at an unprecedented pace, poses significant long-term risks. It threatens to destabilize water supplies essential for farming, hydropower generation, and transportation, as meltwater from centuries-old ice diminishes.
Even at high elevations of 3,500 meters, where snow cover is typically expected, no snow remained at the end of summer. Researchers observed up to four meters of ice loss at these high points, indicating that glaciers are not receiving the snow replenishment needed to survive.
While some glaciers, like Plattalva, have already vanished, scientists emphasize that drastic cuts in carbon emissions could still preserve much of the world's remaining glacier ice. Saving these ice masses is crucial for limiting global sea-level rise.
