Glaciers collapsing from within

Swiss monitoring shows not only rapid thinning and retreat but an increasing frequency of internal collapse, where meltwater streams carve cavities under ice leading to sudden structural failure rather than gradual surface recession. The report records ~5.5% ice‑volume loss in the first eight months of 2026 and mean thickness declines of 2.5–4 metres, with field reports of formerly extensive ice masses reduced to rock desert in a few years. — If internal cavity‑driven collapse becomes a common failure mode, it changes the pace and predictability of glacier loss, raising near‑term risks for downstream floods, freshwater supply disruptions, and abrupt landscape change that demand different planning and emergency response.