The Neocons will tell you EMPs are nothing to worry about...and if they’re wrong, there won’t be anyone around to hold them accountable.
Amazingly, our power stayed on
Were a nuclear device to be exploded in space over the middle of a continent, the damage from the EMP could affect the entire continent. While disruption in Hawaii in 1962 was minor, modern electronic devices are much more sensitive to electromagnetic pulses. A modern EMP from a space nuclear explosion poses a significant risk to modern infrastructure and to satellites and space craft in low Earth orbit.