There are a lot of choices and they depend on individual circumstances. If you own your home, and you are not in the heart of a big city, you could "harden" your home and choose to stay but there are hazards with so many people so close. Your water supply will not last long unless you have a well (unusual in the burbs) and you may not have any room to grow a garden or raise animals so food will become a problem very quickly. If you and your neighbors band together (a very good idea) you may be able to grow and raise food together. You will also have more people to watch for trouble and to fight if it becomes necessary. In survival numbers count.