In that it was both units my suspicions are:
a. It's a quite warm and muggy day here on a 'getawayfriday' of a holiday weekend and while some folks had already left work the companies were still open with their ACs still on while a bunch of the employees got home and turned on their ACs.
b. The power company assumed that would happen so they cut back on output.
c. Both.
Our local power company did get the blame for that huge power failure in the N.E. portion of this country. You see a portion of what they're supposed to do is trim the branches away from the power lines. About 10 years ago they tried to get the phone company to share the cost but the phone company pointed out that the trees don't bother phone lines like they bother power lines.

So our cracker jack power company did what any responsible capitalist would do. They fired the guys that were hired to cut back the trees to keep them away from the power lines.

Anyway things seem to be working OK now. For now.
