If your printers are in an area that's too cold, I'd recommend getting an enclosure for them to retain heat and create an ambient temperature, you'd probably want them to be heating up for a while though to build up to the right temp unless you want to turn a hairdryer on hot and put that in the inclosure for a bit.
I haven't heard of anyone doing that but it might be a worthwhile idea if you'll possibly be out of options for a few weeks.