Electricity is the main requirement of the bitcoun trasingbso if there are calamaty that cut electricity i think there ano possible to do bitcoin trading or even crypto activities
Well, if this will happen only in a smaller area then it will not affect the bitcoin, also there are more high technology devices that can get power using the sun light or the wind so for me if this will not worldwide then this can address and fix easily.
That's it, if you turn off the electricity you can always run generators, alternative power sources, such as solar panels and more.