Glacial melting in Switzerland was once again enormous in 2025. A winter with low snow depth combined with heat waves in June and August led to a loss of three per cent of the glacier volume. This is the fourth largest level of shrinkage since measurements began. Consequently, the ice mass reduced by one quarter in the last ten years. This was reported by the Swiss Glacier Monitoring Network (GLAMOS), which is based at ETH Zurich and the Universities of Fribourg and Zurich.