We have to remember that the world will see the two prophets testifying in Israel during the tribulation. Without today’s technology, we would not be able to do this, which leads me to believe that EMPs won’t be used.
However, we know that Psalms 83 and Isaiah 17 will occur, which leads me to believe that bombs and nuclear power will be used on nuclear facilities in Iran and Damascus will cease to exist. I pray that I will not be here when this occurs. Jesus, Please Come.
An EMP attack will only disable a country’s electronic capabilities temporarily. All the damage could be repaired within a few months to a few years depending on the power of the weapon. During that time many people would die from the lack of the services they depend on, especially in advanced countries like the US, but eventually these services would be restored. The death of the two witnesses is at least several years in our future, so if we sustain one soon it’s likely that the damage suffered by such an attack will have been repaired.