As global warming accelerates, polar buttressing is collapsing. Over half of all ice sheets are now prone to sudden collapse, leading to rapid melting, threatening global sea levels.

More than half of the ice shelves holding Antarctic glaciers in place could crumble as the atmosphere warms.

https://www.livescience.com/antarctic-ice-shelf-cracks-melting.html?fbclid=IwAR1qrl1vkJ4zRHqKRYISEgj_gwqzWFkObi7KfTjft-okY5iBx1_TsnvPadg