The glaciers on Cascade mountains are relatively small but on Mt. Rainier it's extremely unlikely they will disappear in 30 years. The Emmons and Tahoma for ex

The glaciers on Cascade mountains are relatively small but on Mt. Rainier it's extremely unlikely they will disappear in 30 years. The Emmons and Tahoma for example are large and start at 14,000 feet. They will continue to have accumulation zones for many decades. Plus it takes a while for ice to melt even with heat waves, even at lower elevations and even if the temperature rise accelerates. That said it's not unreasonable to suggest that glaciers with an accumulation zone below say 8-9,000 feet will be toast. That takes out most glaciers in the Cascades outside of the volcanoes and a few peaks in the North Cascades. I was just eyeballing things based on having spent a lot of time on the mountain, but this conclusion seems to be supported by recent geological work. [1, 2] [1] https://gsa.confex.com/gsa/2017AM/webprogram/Paper299694.html https://gsa.confex.com/gsa/2017AM/webprogram/Paper299694.htm... [2] https://glaciers.nichols.edu/north-cascade-glacier-retreat/ https://glaciers.nichols.edu/north-cascade-glacier-retreat/