Tick marks show the number of migrants (inflows and outflows) in thousands. States are ordered clockwise by the size of inflows. The top ten outflow states are colored; all other states are in grey. Credit: Nature Climate Change.

Sea level rise is typically thought of as a coastal problem, with cities from New York to San Francisco pondering new coastal defenses such as sea walls and sturdier buildings.

However, by making large swaths of the U.S. shoreline uninhabitable by the end of this century, sea level rise could reverberate far inland, too. In fact, every single U.S. state will be affected by climate change-induced sea level rise, a new study found.