To stylize, it's a situation where the risk of a limited or full exchange (i.e., nukes hit the U.S.) goes from very low (0.01% per year?) to low (2% per year?).

To stylize, it's a situation where the risk of a limited or full exchange (i.e., nukes hit the U.S.) goes from very low (0.01% per year?) to low (2% per year?). I've got the resources to hedge that catastrophic 2% risk by going to stay at a family place in the countryside, and it's nice there to boot. So why not do it? The worry is many other people will have a similar idea, and getting out of the city will become slow and difficult. In the case where a strike in Ukraine results in quick escalation to some sort of exchange, you've got maybe an hour tops (I think flight time for ICBMs is ~25 minutes, but figure there's some decision-making time plus population centers are secondary targets).