But sometimes an engineering solution just won’t be possible. “Some of the adaptation strategies could be that we just relocate the entire community, because for some reason we cannot defend them using in-place structures like sea walls,” says Shirzaei. This is known as managed retreat, and it’s already happening in some cities. San Francisco, for instance, is giving up part of a coastal highway by replacing two lanes with a trail so the land can better hold back rising waters.

Source: An Actual Space Laser Shows How Devastating Sea Level Rise May Be – Mother Jones