One of my fears would be an EMP (Electro-Magentic Pulse) strike. It could come from either a nuclear bomb going off, or an EMP bomb. I would be more concerned of a terrorist attack involving an EMP bomb.
If you are worried about EMP keep tested "known good" spares of all electronic modules for your vehicle and store them in a metal ammo can. Better yet keep several sets of spares. BURY one of those sets.
It's not only the PCM, but the ignition module and the voltage regulator for your alternator.
Spare blocking diodes for your wiring harness, etc...
weapons and ammo.
let me point out that the paperbox "Bricks" of 22LR ammo
eight of them will fit intact (in two layers) in the bottom of a 50cal ammo can
and you can put an additional 2 bricks in the top of the can if you break down the bricks
into their individual boxes of 50, for a total of 5000round in a single 50cal can.
Stored in an airtight 50cal ammo container 22LR will work fairly reliably even after 30+ years.
Last time I actually counted I have FOUR 50cal ammo cans.
aside from the obvious bricks of 22LR ammo, shotshell ammo I have several 20gallon
container filled with 12ga 1-1/8oz birdshot. not "survivalism" I used to shoot clays
competetively and would routinely burn up 1000round per week (yep, two cases every
week, often more) in practice.
I was told when I first started shooting that if I wanted to get good that I should
"practice, practice then practice some more... and BTW that $10,000 worth of ammo
was probably not a bad idea", I took that advice to-heart.
As for the more immediatly useful I carry a pick/mattock, a shovel and an axe in my truck
along with bolt cutters. on "Road trips" I'll often carry a small chainsaw.
I HAVE "escaped" from a winter weather traffic jam by cutting down a section of highway
fence and "offroading" myself across the right-of-way and off the hopelessly jammed highway.
I only pulled it off because my truck was wearing real "Chains" but once I'd blazed the path
other people followed the trail I'd made.
Someone tried to tell me what I was doing was illegal, I told them
"call a cop and I'll tell him I don't give a shit right before I drive over his fat ass,
IF in the extemely unlikely event that one can get here" (spoken in my best
"are you really that stupid?" tone of voice)
I was doing a "self-rescue" anyone actually trying to prevent me from saving
my own ass from a life threatening situation... (and denial of mobility is an overt
act on their part)
I bring this up to say that to "survive" in a survival situation you must be
prepared to do watever it takes to survive., and there will always be an
officious legalistic dweeb that stands in the way of common sense and
at that point your DUTY is to run over or through them.
a "Disaster" is NOT defined as the event, but the breakdown of services/society
(in favor of a far simpler model) that occour because of it and it's often made
worse by people who fail to recognize that certain rules are "suspended for the duration"
in extreme cases there is only survival & failure.
If someone causes one I will deny to them the other. and yes, you can
read that from either direction and there are multiple connotations ALL
of which I mean in strick, simplistic and brutally final meaning.
In short you must consider mental preparation as much if not more than
material conditions that favor survival of you your family or larger group
by giving you more options.
AD