“Put it in the garage and buy a couple of propane heaters. Get the temp up to within operating range and it’ll charge.”
Car owners who frequently encounter subzero temperatures can install an engine block heater, which tend to cost under $80.
https://www.oreillyauto.com/shop/b/engines-—transmissions/engine-block-heater/aa4ff5ba9381
You plug it in with a long extension cord to your house, and it keeps the engine warm enough to start easily.
An electric car could have a battery heater which diverts part of the charging current in cold weather to warm the battery. Keep your car on the charger in very cold weather and you can drive off in a pre-warmed car.
They do have battery heaters, thermal management is a key requirement. I think this is the problem here - the temps were so cold that the capability of the heater, it’s operating range, wasn’t effective enough.
You expect to have 110 VAC to plug your block heater into? Aren’t you the optimist!