Are low enough to freeze car transmissions and oil pans if they are not heated. I unfortunately had that happen to my car back when I was stationed at Ft Riley KS. I came out of the PX (Post Exchange) and was not able to start my car. Ended up walking about 2 miles to my home. I had to wait until after last formation the next day to go buy a couple of sterno cans from the PX to put under the car to unfreeze my car. With a stiff breeze blowing across the parking lot it was not very fun.