As far as I know the only way you are 100% sure that you will be OK is pulling all plugs from the wall. As Sugar has advised look into getting the main box protected as an all encompassing solution.
Electrical Question
I normally disconnect my power cords from the wall on my amps when not home or not using. I now have a amp where access to the outlet is not easily accessable. I assume the local amp on/off switch will protect from power surges etc., but what about lightning strikes ? . Will the on/off switch protect the amp ? . Can lightning "jump" the switch and cause damage ? ...... I do not like to use power conditioners/surge protectors with my amps....