Valais
Alert level raised after repeated glacier collapses near Randa
Authorities in Randa, Valais, have raised the alert level after several glacier collapses on the Weisshorn’s eastern hanging glacier. Further rockfalls cannot be ruled out, and monitoring continues within a designated danger zone as poor weather complicates assessments.
At least three rockfalls hit the Weisshorn’s eastern hanging glacier on Monday, August 24, prompting Randa to maintain alert level 3. The Valais municipality said the largest collapse occurred between 5pm and 6pm, after monitoring detected a significant increase in movement.
The latest activity has kept the situation tense above the Mattertal valley. Authorities have defined and marked a danger zone, where entry is prohibited until further notice. Official routes used by pedestrians and cyclists are also closed.
Further rockfalls remain possible in the coming days, according to the municipality’s report to the Keystone-SDA news agency. The affected material could reach the marked hazard area, making compliance with the closure essential for residents, visitors and mountain users.
Poor weather is complicating the immediate assessment. Officials cannot yet determine reliably how much material came down in the latest events. Monitoring will continue as authorities assess whether movement on the glacier persists or begins to ease. The restrictions give local services room to observe the slope without exposing people to a changing hazard.
Authorities Track Movement Through Weather
Alert level 3 was already introduced on Monday as glacier movement accelerated. The municipality has monitored the Weisshorn’s eastern hanging glacier since the end of June 2026, when increased activity indicated a need for closer observation.
That monitoring now operates within a clearly marked danger perimeter. Authorities are tracking the slope and reviewing how the risk develops after the latest collapses. Weather remains a practical obstacle: cloud, precipitation and poor visibility can limit the ability to inspect the release zone and estimate the volume of ice, snow and rock involved.
The current restrictions cover more than the immediate foot of the glacier. The official access routes for pedestrians and cyclists remain closed because additional falls could extend as far as the marked hazard area. The municipality has not announced a timetable for reopening them.
For Randa, the response reflects a familiar mountain safety procedure. Local authorities identify the area at risk, restrict access and use ongoing observations to decide whether the danger is increasing or receding. Until those observations provide clearer evidence, the perimeter remains closed.
Randa Knows the Cost of Unstable Slopes
Randa has faced glacier and rock hazards for more than two centuries. The largest historically documented break-off on the Weisshorn dates to 1819, when an avalanche caused extensive damage in the village. Later break-offs in 1972 and 1973 were less severe and stopped on a glacier field.
The municipality also carries the memory of a major instability on the Längenfluhberg. In 1991, a triple rockslide unfolded over several weeks and sent almost 50 million cubic metres of rock into the valley. The debris buried the railway line and road and dammed the River Vispa. No people died, but livestock perished and 33 buildings were destroyed.
Those events form part of the risk landscape around Randa, where settlements, transport links and tourism infrastructure sit below steep Alpine slopes. The history does not predict the size or timing of the current Weisshorn activity. It does explain why local authorities maintain defined danger zones and react quickly when movement increases.
Swiss researchers have linked a rise in small Alpine landslides to climate change, while noting that the causes of large natural disasters are more complex. The current source does not assign a specific cause to the Weisshorn collapses.