Went and looked for it after you mentioned it:
A megawatt of power there, creating a blue and ultraviolet plasma hell around that substation? Hard to estimate the size of the discharge from its city-wide luminous emission.
I'm thinking about 20 50 kilowatt searchlights, so yes, likely the better part of a megawatt.
Transformer might have .. externally damaged .. or maybe just been too hot too many times.