There seems to be a common theme that revolves around disaster phenomena — interruption of water supply.
Stock up one gallon of water per person, per day — for however many days it will take for water service to be restored.
How many days is that? No way of knowing. Better to have water stored and not need it than to need water and not have it.
And have water purification equipment on hand. Time to buy a Big Berkey or similar.
And if you have a town sewer service, call a plumber soon and get a backflow prevention valve installed asap. If power goes out, no one on the line can flush. And where do you suppose all the effluent that WAS headed for the sewage treatment facility will be headed? Into your bathroom, shower, bathtub, kitchen sink an toilet. Not a good scenario for starting out on your quest to survive a SHTF situation.