Freezing rain actually affects the transition zones and the south more often, so they are more likely to get doors frozen shut in areas where winter is short and occasional.
Freezing rain = rains onto surfaces, then freezes. Not to be confused with sleet, which bounces when it hits surfaces in an already frozen state.
If freezing rain is expected:
>Don’t lock car doors, unless you have a remote.
>Lift the wiper blades up from the window (before the storm), because freeing them up from ice could result in tearing the rubber.
>Have some de-icer, as mentioned, that you can spray onto a door to free it.
Ice on painted surfaces means a tough job ahead. How do you break the ice, and not damage the vehicle? Sometimes striking it can break it off in sheets, sometimes it won’t. Sometimes, people who are ill prepared won’t have de-icer, and will resort to hair dryers. I’ve sprayed WD-40 into door seams, but on my older 4WD truck, so I didn’t freak out if it got on my paint, and I don’t think it ever hurt it anyway. (I’ve done it to prevent freezing and to free doors up after freezing).
With your hand, strike all around the door seem to free it up. Most frames are solid enough to accept a good whack. Just go around the seam as you would if you were trying to loosen the tightest pickle jar lid you ever experienced, and you resorted to loosening it up with a butter knife.