You had no power but you had hot water ... 
Yes.
idk why that confuses you (But then again i dont know much about the connection between power, and water heatage)
But if it helps clear your mind, My towns split between 2 power grids of diff companys. Basically the Beginning of town (My half) is power by duke. While the rest of the town is powered by the town itself.
The town got its power back on about 4 days before us on the Duke grid did.