I think you might have answered my question but in any case, if my electronics are shut off will it still damage them?
A microwave oven is a Faraday cage, you can store some of your items in an old one. Be sure not to turn it on though.
Yes, even if shut off. Several components of an EMP blast, the first two within line of sight. An E1 pulse component of EMP will burn out unshielded micro-electronics by creating very high voltages in them and burn them out in nanoseconds. Surge protectors won't help, and it'll cause damage even if electronics aren't plugged in. What is bad, is that an E1 pulse will fry surge protectors, allowing the slower E2 pulse to destroy circuits that are plugged in. An E3 pulse will damage electronics connected to the grid not within line of sight of an EMP weapon, by traveling along the grid far away. If unplugged, the electronics are protected from E3.
You can induce currents in coils of wire near each other, to convert one voltage level to another level voltage, as in transformers. An EMP blast does the same, inducing a very high voltage in the circuitry of electronics beyond what they can handle - even if shut off. That's why you need to shield critical components where external pulses are diverted to ground.