Yep! That's what I'm doing. I'm up in the Ocala area and I have saved gallon water jugs from Publix I store in the bottom of the pantry after using the water in them and fill up when a hurricane makes its appearance.
We also save milk jugs and store them in the garage filled with water for the toilets (well and septic) and a 30 gallon trash bin we fill with water to refill the jugs if necessary. Bread, peanut butter, crackers, protein bars, candles, lighters, batteries, and flashlights (it's REALLY dark out here in the woods at night)...
Emergency light trick
A plastic gallon jug of water and a 4 dollar LED headband light
The type of light a cave explorer would use
You can put the led light bulb facing the water and secure the strap or attaching band around the jug
It will light up a room enuf to see