The problem isn't the scale, it's that the pennycutters decided to build the backup generators so low that they'd get flooded. And they have been many times.

The problem isn't the scale, it's that the pennycutters decided to build the backup generators so low that they'd get flooded. And they have been many times. Just that previously, in those cases, the grid was still up, and the reactors running. If the reactors were in progress of being shut down, and the connection to the grid severed, this could have become the same issue as with Fukushima.