Thats very dangerous and why I have UPS set up in my house. Expensive electronic equipment can get fried when they lower the voltage. I haven't even listed the times that happened, but about 25 years ago, when I only used surge protectors and not UPS, one of my computers fried (literally, I smelled burning rubber inside) during an undervoltage event associated with a thunderstorm. And it's happened numerous other times not even associated with any bad weather at all, but I've always had UPS systems since that first disaster that I used my homeowner's insurance to pay for.