An avalanche is a rapid flow of snow, ice, and debris down a mountainside. It typically occurs when a layer of snow becomes unstable, often due to factors like heavy snowfall, warming temperatures, or disturbances such as skiers or snowmobiles. Avalanches can vary in size and speed, posing significant risks to anyone in their path. There are different types of avalanches, including slab avalanches, which occur when a cohesive layer of snow breaks away, and loose snow avalanches, which involve loose, unconsolidated snow. Understanding the conditions that lead to avalanches is crucial for safety in mountainous regions, especially for outdoor enthusiasts.