For the past several years, several glacier tongues on Mount Shasta have been reported to be growing. the only ones in the continental US to do so.
Last September, however, the mountain erupted in a massive mudslide, thought to be caused by the heat and drought that California was experiencing at the time.
The mudslide went on for many hours; apparently the mountain was releasing a considerable volume of debris that had been dammed up when a snow melt lake on or in the Konwakiton Glacier suddenly collapsed.
Below, Shasta's Whitney, Bolam Glaciers: geotrippers