From the quoted BBC article:
It was just on the news today that a part of Trøndelag County has been without power for 3 days due to extreme weather during the weekend. It could be another 2-3 days before power is fully restore to some remote locations.
That is the biggest treat for Norway these days.
Yes we are aware of our closeness to Russia and the danger of a 3rd world war, but it is not likely that Russia would cause such an event.
There are other treats in the world that is as likely to be the trigger.for WWIII.