Arriving in Venice years ago, Robert Benchley, the New York journalist and wit, is said to have sent a mock-panicked telegram to his editor: “Streets flooded. Please advise.”

After the enormous storm last week, which genuinely panicked New York with its staggering and often fatal violence, residents here could certainly identify with the first line of Benchley’s note. But what about the second?

If, as climate experts say, sea levels in the region have not only gradually increased, but are also likely to get higher as time goes by, then the question is: What is the way forward? Does the city continue to build ever-sturdier and ever-higher sea walls? Or does it accept the uncomfortable idea that parts of New York will occasionally flood and that the smarter method is to make the local infrastructure more elastic and better able to recover?

Gov. Andrew M. Cuomo on Wednesday gave a sea wall the nod. Because of the recent history of powerful storms hitting the area, he said, elected officials have a responsibility to consider new and innovative plans to prevent similar damage in the future. “Climate change is a reality,” Mr. Cuomo said. “Given the frequency of these extreme weather situations we have had, for us to sit here today and say this is once in a generation and it’s not going to happen again, I think would be shortsighted.”