An alarming new study  has found that, no matter what we do to fight climate change, it is already too late for more than 400 U.S. cities  — including Miami and New Orleans — which will be overcome by rising sea levels caused by anthropogenic climate change. Under a worst-case scenario, New York could be unlivable by the year 2085. Most of the population in those cities live within five feet of the current high tide line.
“Some of this could happen as early as next century,” said lead author Ben Strauss, vice president for sea level and climate impacts at Climate Central, a nonprofit climate news organization with offices in New York and Princeton, New Jersey. “But it might also take many centuries,” he added. “Just think of a pile of ice in a warm room. You know it is going to melt, but it is harder to say how quickly .”