Following days of heavy snowfall, a train has derailed in an avalanche in Valais, injuring five passengers. Authorities have issued the highest Level 5 avalanche warning for parts of the Alps, leading to widespread road and rail disruptions and highlighting new research on the unpredictable nature of snowpack fractures.

"Cracks in the snowpack can race across the surface at more than 100 metres per second â far faster than theory suggests is possible."
"A train derailed early on Monday in the canton of Valais in southern Switzerland... passengers were likely to be injured as a result."
Terror struck the Valais Alps on Monday morning as the raw power of nature collided with Swiss infrastructure. A regional train on the FerdenâGoppensteinâSteg line was violently swept off its tracks by a massive avalanche, leaving five passengers injured and a nation on edge. This is not a drillâit is a stark reminder of the mountain's volatility.
The derailment occurred in the Goppenstein region, a critical transit corridor now buried under debris. Emergency teams scrambled through treacherous conditions to reach the site, where the sheer force of the snowpack overwhelmed the heavy rail machinery. While the injuries are currently reported as non-life-threatening, the psychological impact is immense. The line remains totally paralyzed, with officials confirming that the disruption will last until Saturday, February 20th, at the earliest.
This incident serves as the flashpoint for a broader crisis gripping the region. With up to 80 cm of fresh snow dumping on the peaks in a matter of days, the structural integrity of the snowpack has reached a breaking point. The derailment is not an isolated anomaly; it is a violent symptom of the extreme weather currently hammering the Southern Alps.
Switzerland is on a war footing with the elements. On Tuesday, the Federal Institute for Snow and Avalanche Research (SLF) issued a Level 5 avalanche warningâthe highest possible designation on the scale. This 'Very High' risk alert is a rare and ominous signal, reserved for conditions where catastrophic, spontaneous avalanches are not just possible, but expected.
While the alert has been slightly downgraded to a Level 4 'High' risk in some sectors as of Wednesday, the situation remains critically tense. The sheer volume of fresh precipitationânearly a meter in some high-altitude zonesâhas created a loaded gun on the slopes. The danger is indiscriminate, threatening transportation corridors, ski resorts, and isolated hamlets alike.
Authorities are urging extreme caution. This is not the time for recreational bravery. The transition from Level 5 to Level 4 does not signal safety; it merely suggests the catastrophe is slightly less imminent, yet the snowpack remains treacherously unstable. The SLF's bulletins are clear: the mountains are currently a no-go zone for off-piste activity, and residents in threatened zones must remain vigilant.
As emergency crews battle the snow on the ground, scientists in Davos have uncovered a terrifying new reality about how avalanches begin. Groundbreaking research published in Nature Communications reveals that cracks in the snowpack can propagate at a staggering 130 meters per second. This obliterates previous theoretical models, which capped speeds at 80 meters per second.
This is a game-changer for public safety. The study, led by the SLF, proves that fractures can race across a slope faster than a Formula 1 carâexceeding the shear-wave speed limit previously thought to bind them. Why does this matter? Faster cracks are harder to stop. They cover more ground instantly, increasing the probability of massive, catastrophic slab releases.
"Cracks in the snow are spreading faster than previously assumed," the researchers warn. Gravity, it appears, is supercharging these fractures, driving them with lethal efficiency. This new data explains the explosive nature of the current crisis in Valais. We are not just dealing with heavy snow; we are dealing with a physical phenomenon that is more aggressive and unpredictable than science had anticipated until today.
The Alps are effectively under siege. The avalanche crisis has severed key arteries in the Swiss transport network, isolating world-famous destinations and leaving travelers stranded. The rail line between Kandersteg and Brig is dead, a casualty of the Goppenstein derailment, forcing passengers onto replacement buses that are struggling through the snow-choked roads.
Road access is equally dire. If you are trying to reach Zermatt or Saas-Fee, turn back. The main roads to these iconic resorts are blocked, cut off by the relentless snowfall and the looming threat of further slides. While the road to the LĂśtschental Valley has partially reopened as far as Wiler, and access to Arolla has been restored, the overall picture is one of paralysis.
This gridlock is expected to persist until the weekend. The message from the canton of Valais is stark: mobility is a luxury right now, not a guarantee. With the ground beneath the snow shifting faster than ever before, reopening these routes is a calculated risk that authorities are hesitant to take. For now, the mountains remain closed for business.