My take way from this is three things.
One, what will be the cause?
It’s an election year in both the UK and America. Regardless of who wins either election political systems around the world will be nervous until they know who will win. You can also pretty much guarantee there will be a bit of “kinetic” demonstrating in major cities after the results come in.
Solar activity has been producing some spectacular displays lately, but there is always the risk of a Carrington event.
Pandemic has been and will always be a possibility (Remember pandemic has no bearing on the seriousness of the infection, just the numbers involved).
War, personally I think we have a higher percentage chance of a European war than it any time in my life (I am 61 this year). But remember war dose not automatically equal MAD.
Two, duration.
The government site says 3 days (72 hours), this is the usual duration for these things, and I believe its from the early days of American civil defence. Personally, I think 7 to 14 days would be a better target. But one day is better than nothing.
Three, selling it to children.
I am not an expert on this one, but my youngest (he is 11 this year) comes home with some strange ideas from the school. And I lay the blame solely at the feet of the teachers for this, one teacher even told him the cottage cheese in his packed lunch was disgusting stuff.
I am lucky that I run the local Scout group, so I have all my kids prepping. They made solar powered jam jar lights last backend, they all have “camping bags” ready packed. They can (sort off) set up a field kitchen. The secret is making it fun and challenging. And if your local group has a Squirrel Dray, kids can join as young as 4.
I am passionate about groups that get kids outdoors, Scouts, Guides or Cadets, if run correctly the difference in personal confidence is amazing.