In GA the majority of folks use gas heat. But probably a lot don’t. In the summer like July and August if you don’t have AC you can seriously expire. It is so hot you can’t breath. Poor old folks down in the projects etc die every summer here because they only have a fan or don’t even have that.
I don't think that lack of A/C due to lack of electricity is going to change that since that disparity has been true since before A/C. It is basically the fact that heat can be alleviated rather easily, adapted to, etc, but cold wears you down.