Isn’t your pool a salt water pool? Boiling won’t desalinate the water. There are other ways to do it though.I guess I have plenty of water in the pool. 25k gallons should last awhile, so I can boil it if I can find wood or fuel... That covers one thing. Heck, I can even keep the toilets running by running buckets up to fill up the toilet tanks. I am on a sewer, so that should hold out for awhile...
Food would be an issue pretty quickly... If SHTF the best thing I can think of is make a food run before it's gone, beans and canned goods that keep a long time, make a trip to Home Depot for supplies to barricade my house a bit, Gas up the vehicles and move them inside the garage, and then hunker down as long as possible.
Unless you have property and somewhere else to go away from everyone, I feel like the options in a true disaster are pretty limited.
You can go awhile without a lot of food, but it only takes a couple days without water to put you down... so the pool becoming a water source I feel is a big help.