Frozen rental car

This week I was traveling in Fairbanks, AK. When I got up in the morning to start the car and warm it up, the temperature on the dash indicated it was -29. On the radio they said it was -31. I opened the door to the car with some difficulty because it was frozen. Then, I couldn't close the door because the latch mechanism was now frozen stuck. Hertz no doubt had taken it to the car wash the day before! I figured it's okay, I can drive with one hand on the wheel and one hand holding the door closed. Thankfully, after 20 minutes and $10 in gas I warmed it up enough to get it working. How do those people live up there?