> A collapse of the entire glacier, which some researchers think is only centuries away, would raise global sea level by 65 centimeters. And because Thwaites occupies a deep basin into which neighboring glaciers would flow, its demise could eventually lead to the loss of the entire West Antarctic Ice Sheet, which locks up 3.3 meters of global sea level rise. “That would be a global change,” says Robert DeConto, a glaciologist at the University of Massachusetts, Amherst. “Our coastlines will look different from space.”
Fun ("fun") fact, the NOAA has a sea level rise map for the US, so you can see for yourself how this Florida-sized ice sheet impacts the real Florida's coastline.
Overview: https://www.climate.gov/maps-data/dataset/sea-level-rise-map...
Direct link: https://coast.noaa.gov/slr/
Select "Sea level rise" on the left and drag the slider up and down. Dark blue is the current sea level, light blue is area that would be inundated.