Temporarily disable alarm without key?

I can't find anything else online, and I doubt this will get answered in the timeframe I'm dealing with, but I thought I'd try. My wife has lost her key two hours away from me(and the other key). They're currently waiting for a sheriff to come help try to unlock the car(a park ranger already failed), but they aren't actually sure if the key is in the car, or if it's lost someplace in the wilderness. If it's not in the car, they're facing two hours of the car alarm going off and no way to get away from it. Is there a particular fuse they can pull to disable the alarm until I arrive with the other key?