One of the really scary things to face dealing with PSHTF is fire. You might be able to talk your way out of a situation involving another person and perhaps a weapon, or even several people, each possessing one or more weapons, but fire doesn't listen.
Fire doesn't care that your family photographs are the only copies anybody has.
Fire doesn't care that the cat can't get out by herself.
Fire doesn't care how it started, just that it keeps going.
And the fire department may not respond if you can get a hold of them. Not because they don't want to, but because they can't if there's no fuel for the truck, or if a law has been passed that you have to pay for fire service, and you can't afford to.
If you want to stymie fire, you need to think prevention. A fire extinguisher is a good thing to have around, as well as baking soda for a grease fire [water only aggravates the problem], but prevention tops any other method of putting out a fire because it does it before the fire even begins.
Check out these links from the National Fire Protection Agency:
Fire and Safety Equipment
Gas and Propane