I'm right here with you in State College Conlan, waiting to have to snow-rake 500 cars, move them, plow, and move them back...I hate the car business in the winter!!!
Luckily my house is very odd and has 3 different heat sources, electric being the main one, but I also have 2 propane heaters built into the walls, one on the third floor and one on the main floor, and the tank outside is full...And the walk-out level has a huge, old wood stove that heats the entire house if I light it, so I just moved a ton of wood in...But I've been there where you're at, as I only started having the propane tank hooked up to the house this year as a back-up to the electric heat...
***One thing that I always have on-hand are a ton of "Hot Hands" and "Hot Feet", or sometimes they're called "Fisherman's Friend", the little packs that you open and they emit chemical heat for hours and hours...They are wonderful if the heat goes out..Before I had a back-up heat source I would put my birds into their small plastic carriers or their Pak-O-Birds, then I'd put a "Hot Hands" in the bottom of the carrier wrapped up in a towel so they couldn't get to it or burn themselves (they get hot!)...Then I'd put the 3 carriers with the Hot-Hands in them into my master-bedroom closet, as it's big enough for all of use to be comfortable while having 3 plastic carriers in there and me, but not too big that it doesn't hold-in heat...Shut the door and bring a couple of battery-powered shop-lights and LED lanterns, and some sleeping bags, blankets, and pillows, along with my fully-charged Tablet and cell phone, along with several fully-charged power-banks/sticks, so I'd have a good 48 hours of battery back-up power for my Tablet, phones, and the lights/lanterns...And I swear, those Hot-Hands things kept the entire closet toasty warm and the birds didn't even notice anything was wrong...
The Hot-Hands things last a lot longer than hot water-bottles do, you can get a good 4-6 hours out of them, and they're cheap. I buy them at Walmart in the camping section, and buy a ton at a time so we're stocked-up just in-case, and Walmart is half the price of Dick's Sporting Goods or anywhere else I've seen...Just make sure if you use them to keep your bird's warm that you wrap them up in a towel so the can't chew on them and so they don't get burnt or over-heated by them...You can either put your birds in a small carrier with them in the bottom, OR you can actually wrap them in a towel and put them in the bottom of their cages if the cage is small enough or you use a few of the Hot-Hands, and then just cover the cage with some blankets/sheets to lock-in the heat...
Good luck, everyone here is freaking out already, I think you're in Lancaster or Scranton area? So about 2 hours east of me either way. I think you're set to get a bit more than us, but not much more, we're hearing about a foot or so...