Thanks all for the helpful information. Wanted to update folks. I am indeed two hours and two mountain ranges inland from the San Francisco coast - so while it is rainy in the winter, our summers here are dry and hot.
I've separated the two and fixed up the heat and light and enclosure...
Thank you all for your support! I thought I was adopting one dt that was ready to brumate (indoors, I was prepared for the double box method), and got talked into two (saying they were adult females who lived together all summer and would have no issue continuing to share an outdoor enclosure...
About four weeks ago I adopted two desert tortoises from a tortoise rescue. At the time they had bubbly noses and were not yet hibernating, but very sleepy and slowed down. On the advice of the rescue, I've kept them warm and awake in an indoor enclosure with uvb/heat lamps and some sunny...