Floods are natural events, and and they have predictable consequences. One of them is the disruption of ecological niches for various flora and fauna. Some plants are adapted to periodic seawater inundation, but animals must simply flee. For some of the millions of rats that make NYC subways their home, escape was not possible. I’m sure they will return in force, however, as soon as the tunnels are pumped out.
You can hardly blame the rats for returning to a risky habitat since their life spans are rather short, and they don’t invest in capital facilities. Not so our human brethren who will quickly rebuild communities in some of the most unstable regions known in the northeast, the shores and barrier islands of NJ and NY state.