Thinking “water” in hurricane season can be important. Other than several gallons that you may get at the store during the panic attack where else are you going to store water for a week? Most people will go to the bathtub and that is great; I use silicon seal and a piece of plastic over the drain/plug to make sure it does not leak. This needs dry time so think ahead.
One place people forget about is their hot water heater. That is 30 to 50 gallons of drinkable water, no pressure no problem. On the side is a faucet that is garden hose ready. You may want to try this out before you need to use it. Remember this water can be hot if your system is on. It could also be plugged with scale.
If you have other good ideas write me!