I am traveling in Quebec and after a very rainy day the temperature dropped below freezing for a few days. It became bitterly cold and when I went to get gas I was unable to open the fuel filler door. Fortunately I was staying here for a few days so I had time to deal with the issue. We are staying at a rented cottage and I was able to run an extension cord out to the driveway and then I used a hair dryer to unfreeze the lock. This worked and now I can fill the tank and drive home at the end of the holiday week. The other option was to leave the car in a heated garage for several hours but this worked. If you are traveling to a cold place don't wait until your gas gauge is low to refill just in case your fuel door is frozen.