Had it 2 times already of the neutral bus bar ( plus all the earth wiring) being stolen in the substation across the park, and the local mains voltage going up to over 280VAC, with the UPS beeping and bucking the incoming mains down for me. Went to the meter room, measured all 3 phases and turned off the big red switch, then called the Metro and informed them of the loss of neutral in the system.
Too bad for the rest of the street, they either lost every thing plugged in ( anything in standby basically) from the high voltage, or they blew out geyser elements as tyhey kicked in and cooked, or they had only dim lights in the phase winning the competition. Too bad for the coffee shop, turns out that the coffee machine heaters won the first few rounds, but the lights, the POS system and the fridges lost them, then other loads kicked on and did the coffe-o-matic in as well. I went out and came back later to turn on the building, only had 2 people lose TV sets and decoders that were plugged in.