Can confirm, I got that pamphlet recently. I feel like being told to prepare for a nonspecific catastrophe does end up putting danger and catastrophe in people's minds, makes some sort of non-specific doom feel like a more real and immediately present possibility, but I also do of course acknowledge that being prepared for disasters is a very important thing. The Norwegian pamphlet does mention war but seems to focus more on other things like extreme weather.

Edit: Looking over it again, it mentions war a little more often than I remembered.