I just saved one sim from Grim after she collapsed from freezing. She was on the street in front of my sim's house and my sim convinced her to group up. It would take too long to walk back to my sim...
There is another thread talking about this here: http://forums.thesims.com/en_US/discussion/942735/freezing-to-death-jogging-in-cold-weather - Not saying your thread isn't good, just sharing! I had my own winterfest miracle at the gym on the day of release.. I reloaded after I lost 10-12 npc sims: https://i.imgur.com/luwB3Y8.png LittleMsSam is working on a mod to deal with this right now. Details are in the other thread.
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