After almost 18 hours without power, it was restored!

I don't know exactly when it came back on - was on generator power. I had texted the utility company's automated system, and it replied back (paraphrasing): "Yo, dummy - you have power...why are you asking us the status?" I go flip the switches to change from generator power back to the utility, and sure enough - it was back.

Having multiple levels of redundancy for power (whole-house generator, as well as a big-ass battery and inverter for more important loads, like heat, and the refrigerator) is something I'm truly grateful for!