Swiss Valley Faces Disaster as Massive Earth Fissure Expands Rapidly

A massive earth fissure in Switzerland's Val d'Anniviers has widened dramatically since its first appearance after the 2018 floods. By March 2026, cracks stretching up to 10 metres across have displaced over 200 residents, closed vital roads, and disrupted daily life. Authorities now warn of a potential landslide that could threaten nearby villages and infrastructure.

The fissure, first spotted after severe flooding in 2018 and 2024, has grown steadily worse. Erosion from the swollen Navizence River weakened the slope's foundation, leading to a 250-metre-long crack now expanding by 2 to 4 millimetres daily. In areas like Ayer and La Sage, the gap has reached up to a metre wide, forcing evacuations and road closures, including Route de Zinal.

Geologists from the University of Lausanne monitor the site 24/7 using laser scanners, drones, and webcams. Their data shows up to 500,000 cubic metres of earth and rock could eventually collapse. While a sudden, catastrophic landslide remains possible, experts believe the movement will likely happen gradually. The risks extend beyond the immediate area. A collapse could block the Navizence River, creating a natural dam that might burst and flood the valley. This scenario would endanger Chippis, a village of 1,500 people, prompting officials to draft evacuation plans. Residents have been ordered to avoid the hazardous zone as safety measures intensify. The crisis has already caused severe disruption. Water supplies have been damaged, construction projects halted, and tourism and agriculture losses have reached an estimated CHF 50 million. Schools operate remotely, and access to affected areas remains heavily restricted.

The expanding fissure in Val d'Anniviers continues to threaten homes, roads, and livelihoods. With monitoring systems in place and evacuation plans ready, authorities are preparing for both gradual shifts and a possible sudden collapse. The situation highlights the long-term impact of past flooding on the region's stability.