Considering your area, the sources of water that will be available to you might be fairly different.
Shelter in Place
For starters, if you are in a survival situation and you are choosing to hunker down at home there are concealed sources of water in the home that you can use. One thing you should bear in mind, if you lose your inbound water supply close off the valve that controls it so what’s left in the system does not leak back into the main system. To access this water you will need to let air into the pipes so the water