Howdy tonight JJ! I have no idea, I was wondering that too but I did see an old photo of ranchers wearing great big, long, fur coats so I guess that helped. Otherwise I don't know, no wonder many people died. they don't know how many but it had to be many hundreds, maybe thousands. and millions of head of cattle, horses and sheep. And back then with no modern insulation or windows? I'll like our modern luxuries!