Between this discussion and the current state of world affairs, I have started thinking in terms of time and implementation of contingency plans.

I would definitely go into "post-hurricane" mode if the lights went out for unknown reasons. That would include the immediate investigation of any EMP effects. Trying to crank the cars, the electronically constructed radio's, my cell phone function, etc.

If I find that EMP has occurred or that there is a high probability that it has occurred, I would then go to post-nuclear (fallout preps) mode.

Then we would have other things to consider.