...but that's not the O'Neill tunnel in the video. That's probably the Fort Point Channel Tunnel, which carries I-90 between I-93 and the Ted Williams Tunnel. The blue tiles indicate a tunnel passing under a body of water. The O'Neill Tunnel doesn't pass under water.
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The preview of a not-so
The preview of a not-so-distant future?
https://coast.noaa.gov/slr/#/layer/slr/1/-7907592.086657944/5213055.9693...
Maybe the O'Neill Tunnel did flood...
...but that's not the O'Neill tunnel in the video. That's probably the Fort Point Channel Tunnel, which carries I-90 between I-93 and the Ted Williams Tunnel. The blue tiles indicate a tunnel passing under a body of water. The O'Neill Tunnel doesn't pass under water.