Here is something else to keep you up at night.
In a bit if synchronicity, I found out in WWII they used balloons with long wires to float over to Germany and short out their power lines. It is unknown just how effective it was, as the Germans didn’t report on such instances. But Sweden and other countries were like, “Can you please stop shorting out our lines with your balloons?”
And then just the other day, I saw a news article about a drone being found with long copper wires which could have shorted out the power grid. This is ripe for terrorists or assholes looking for the the lulz to do some serious damage.