I've got a soft spot for Dachshunds, as that's all my folks have had for 40+ years. No way I'd leave her out in that weather. They like to be warm, almost hot.
An older heating pad might work, but most of the new ones have timers that time out. Might check the pet stores for heating blankets of some sort. I know my electric blanket will go for 8hrs before shutting itself off.
Hope you find something for her, I hate seeing that..
