https://www.scientificamerican.com/article/warming-caused-a-glacier-in-alaska-to-collapse/

Global warming isn't just causing glaciers to melt—it's making some collapse suddenly.

That's what scientists believe happened at Alaska's Flat Creek Glacier, deep in the mountains of Wrangell-St. Elias National Park and Preserve. In August 2013, a 1,600-foot tongue of ice suddenly detached from the bedrock near the bottom of the glacier. It sent a flood of ice and debris hurtling nearly 7 miles down the mountainside.