Come to find out, some power plants did not winterize their water pipes. two went down. (Luminent) and during the rolling blackouts, the pressure to the natural gas which feeds other power plants made matters worse.
I learned that it is best to live near the Barnett Shale, because they need the gas for the power plants, so we should not suffer blackouts next time. yay
And maybe the hospitals should test their generators periodically.