For many years, we have shared a 500-foot long driveway with people, whom I will call ON. ON, who are now 87 and 97, have been going South every fall and winter for nearly 15 years. This year, for (only mildly compelling) family reasons, they are planning to spend January here, here being the suburbs of DC.
We are on friendly terms with them, but are close acquaintances rather than friends. We do not know their family except to wave to.
I am dismayed at their being here for January. I don't think they remember the heavy snows and power failures that January can bring. I don't think they remember that our driveway is literally impassable for any but a 4WD (which they do not have) if more than a few inches have fallen, nor how icy it is when it starts to thaw. One of them has already broken a hip.
What can we say to ON so that they will reconsider staying North this January? We have to be subtle. They are very touchy about everything, and always have been. They could wind up being housebound for literally weeks if a major storm hits. As I said, we do not know their family at all well. They have only one other near neighbor and she will be evacuated by her family before the first flake falls.
In summary: I am asking for advice on how to tell very touchy people who are not accustomed to listening to anyone about anything that they may be letting themselves in for more than they can cope with.