On May 29, 2025, a big part of the Birch Glacier in southern Switzerland broke and caused a strong mudslide in the Lötschental valley. The village of Blatten was almost fully covered by thick mud. Around 90% of homes and buildings were damaged. About 300 people and animals left the area earlier in May. The glacier was moving fast. One man, aged 64, was missing. Rescue teams used drones with heat cameras to search for him. The Lonza River was filled with mud, and there was a risk of water flooding. Local officials called the event serious and needed immediate help. The Swiss army joined the team to check the area. The environment minister said the event was unusual and gave help to people who lost homes. Experts said the fast melting was connected to climate change. In two years, Switzerland lost 10% of its glacier size. Scientists called this a warning of more danger. Now, special tools watch the glaciers and give early signs. The event shows the need to care for nature.