Sort of like it’s always been? Adapt or die. Good thing we haven’t blown a lot of time and money on that.
One way to adapt is not to live in a flood plain, or at or below sea level. Bodies of water are probably going to flood at some point, and the drainage or runoff system in the area may or may not be able to handle it. The streets in parts of my city routinely become ankle-deep or more with rainwater because the storm runoff system is poorly maintained (clogged) or inadequate. Sometimes the fire department has to send trucks out to the highway and most traveled streets to pump out the standing water.