Intro: Place Jugs in Freezer
Arrange your filled jugs in your freezer as appropriate.
Re-pack the pathetic amount of food you have to sustain you after the tornado, probably two or three frozen pizzas (let's face it, if you can afford to store a side of Angus, you're probably at the country club right now, not reading Instructables).
Optional Step: If the cap to your container fits tightly (i.e. air tight), the pressure build-up from the expanding water may deform, or even crack your jug. I didn't have this problem with milk or water jugs, but did with a vinegar jug. So, if feasible, you might want to leave the lids off until the water freezes.
Optional Step: You may want to cut a piece of cardboard to place over your jugs if you prefer a flat freezer floor.