Swiss Glaciers Suffer 'Disastrous' Year of Ice Loss, Threatening Water Supplies
Swiss glaciers have suffered a near-record loss of ice in 2026, new data shows, as intense summer heatwaves take their toll on Alpine peaks. More than 5% of the country's remaining glacier ice has disappeared in the last 12 months, which scientists say is "extraordinary".
Impact and Concerns:
They warn that such rapid melting is no longer a surprise given the pace of climate change, but it could threaten water supplies for farming, hydropower, and transport in the decades ahead. The loss of glacier ice can also destabilise mountain slopes and increase the risk of landslides, potentially leading to flash flooding.
Factors Contributing to Melting:
There were multiple factors involved in a recent event in Nepal, triggered when a large area of bedrock and glacier ice collapsed, leading to flash flooding. Long-term glacier thinning and the thawing of frozen ground likely raised the risks.
Rapid Melting Rates:
The notable finding from this latest report is not so much that Swiss glaciers are shrinking—which is expected in our warming climate, primarily driven by fossil fuel emissions—but the sheer pace of melting. Until recently, glaciologists considered 2% of ice lost in a single year to be "extreme". This year has seen an estimated 5.5% disappear.
"It's really just disastrous," said Dr Matthias Huss, director of Glacier Monitoring Switzerland, which produced the report.
Conditions Leading to Melting:
Swiss glaciers started the summer in a vulnerable position, covered by less snow than usual after a mild winter. Much of that snow disappeared quickly during the early and intense heatwaves of May and June, exposing the glacier ice below. Bare ice is darker and less reflective, absorbing more of the Sun's energy and accelerating melting.
Water Supply and Other Implications:
Meltwater from glaciers can be crucial for irrigation, hydropower, and shipping traffic during hot, dry conditions. Scientists estimate that Swiss glaciers released 2.2 trillion litres of meltwater between July and September, aiding water shortages this summer but rapidly diminishing their future resources.