They are admittedly overkill. However, again, I am on the southeast coast of Florida. In an Andrew or Katrina scenario, there's not a safe place in the state, I would evacuate to North Carolina to stay with family and my van would make it to somewhere near Jacksonville before running out of gas. I don't recommend it, but in a worse case scenario, two of those cans were going to the very back of the van with me. Not recommended, but better than fighting off zombies with a pick axe stranded on the side of I-95.