I normally like to tease you WTSHTF types, but this type of preparedness (in moderation) is a very good idea in areas subject to natural disasters, especially earthquakes and hurricanes.
In California I always had 2 weeks food and water supply (water rotated) on hand. A month would probably be better.
Firearms and lots of ammo are always a good idea, in any circumstance.
Crosman Benjamin Trail NP All Weather