When the SHTF, living in NYC will be like the movie WWZ.............
In these scenarios, it takes time for people to realize that the situation is real, that it has implications that affect them, and that they need to take action.
For most people that takes several hours to several days.
If people have a plan, they can walk a couple of miles to get to a boat and get away.
They hard part is having a plan, making the decision, and executing it soon enough to be effective.