Awesome. Thanks for the website suggestion. I had been looking at amazon a while back but the listings look sketchy to me. Do you know what the shelf life of the heat packs are when stored? I'm having trouble finding that info.
My tank is only a 20 gallon and low bioload so I'm hoping wrapping it with towels and having two computer backup batteries will keep at least the filter going for a good while. It's also possible to float a hot bag of water to keep temps up...so long as the gas stays on to heat water. Maybe I strap reptile heatpacks to the outside of the towels LOL. Fish are much more complicated than reptiles. Boy are snakes easy!
That's where I'm at. I don't expect to find anything the next few days. Nothing is open because most people here don't have the tires for driving in snow or ice. It's insane that it's under 10 F and snowed TWICE this year. Once is unheard of except every 5 or 10 years. I'm waiting for the rolling blackouts to happen where I am. I'm worried about the pipes once it starts to thaw. I think my electricity is natural gas generated which is much more reliable. But like you said the demand alone can cause them to start rotating the grid.