We just got something like 7 feet of snow and the drifts are up to 25 feet. I was wondering what all the banging and popping sounds were until I figured out it was car tires blowing out from the weight of the snow on top of the cars. There's a large parking lot nearby and all I've been hearing are tires blowing. Some of the louder sounds have been buildings collapsing and I can see several homes and businesses gone in the piles of snow. It looks like the tire companies are going to be real busy in the next few weeks.
If your tires have not yet blown, shovel off your cars. That's if you can even get to them safely. But dont risk your life for a set of tires. Besides it could already be too late. It's likely that your car windshield and/or the roof of the car may also collapse or burst, and it may already be too late, particularly if the tires are blown.