It seems to me (this is not a reproach or an attempt to teach you how to do it), you should take care of alternative sources of energy (gasoline generator) and the Internet (maybe Starlink?) for such emergency force majeure situations, because you are not an ordinary user, but a manager who is responsible both to the customer and to the participants of the signature campaign.
I don't think any other campaign manager has emergency power and backup internet. What's the point if your house is flooded anyway? I'm pretty sure more people end up in a hospital than flood on average, and you can't mitigate all potential risks.I'd get a powerbank though
