I am working with a neighborhood organization to improve tree canopy in my urban area. I got involved with my neighborhood association and another org in an effort to build and strengthen my community. I would love to take more action but I’m not sure what or how. Starting to see now that working together with people helps make us more resilient
If your storing tap water, it's generally shelf stable for about 6 months, so don't forget to cycle it out.
If you have a tanked water heater, you probably don't need supplemental water supplies. A hot water tank provides 100-300 liters of water that circulates on its own. That's a whole bunch of water you don't need to worry about stagnating. This obviously assumes your water tank isn't at risk (i.e. a basement tank is no good when your risk is flooding).
Otherwise I'd recommend water treatment tablets. That's a whole lot more water with (almost) none of the storage space and a much longer self life. Again depends on area, that won't help you in a desert.