Large volcano-associated debris flows known as lahars pose a threat to populated areas downstream from glaciated volcanoes. Although lahars are typically associated with the effects of volcanic eruptions, they can occur whenever conditions allow collapse and movement of mud originating from existing volcanic ash deposits. Melting snow and ice, intense rainfall or the breakout of a summit crater lake can all generate lahars. Landslides at the Mount Meager massif may also be indirectly related to climate change. Several tension cracks extend up to the summit, and as global warming causes glaciers to melt, the meltwater reaches deep into the massif. It then flows along the ruptured surfaces creating landslide zones.