If elecmotricity is an issue, those UPS things are pretty good, if you get a good one. NOT one from Ollie’s, but a good one with clean backup power and voltage issue problems like spikes, brown outs, etc. It’s probably still a good idea to unplug things that you don’t want to replace.
If you have an air compressor it’s not a bad idea to blow out the power lines before plugging stuff back in! Don’t pour water into the back of the computer to cool off the Firewall. It’ll take care of itself. Also, disregard this entire paragraph.