I don't think JW was
the point of contact, but one in the chain? AIW and presumable LE had already been trying to contact SS without hearing back. If I couldn't get hold of my boss, I'd certainly call his PA and anyone else whose number I had. AIW might have tried calling the Dojo if they had the number.
As far as JW's language, consider the source. I say that not unkindly, but to remind us that there are different styles of communication. His background was not that we know of, a corporate business atmosphere where that language would be out of place.
AIW to JW: "We just got a call/visit from LE and SS's house is on fire and nobody can get in touch with him, do you know where he is or if he knows what's going on? No? Please see what you can do on your end." To me, it would be natural to call boss' wife feeling quite a bit of anxiety and I wouldn't suddenly change my way of speaking/texting/personality to
"Pardon me, madam, have you any Grey Poupon?"
I certainly don't see JW being the first to try and contact AS; LE would have done that having gotten the number from AIW and contacting SS first. They don't rely on others to break news like that. In fact, it would be part of their investigation to make the calls themselves.
JW's call was perfectly natural to me. He was worried for her since she was supposed to be at home? I don't know. Was she a mile away at the park with the dogs and could use a ride home? Was she stuck somewhere with a broken car and needed a ride?
All natural to me. Our more authentic self comes prevails in times of stress. I'd be inclined to be casual like that, too since a fire at your home is obviously stressful I don't need to add to it. Just one way of looking at it.
It may not be the way a lot of youse guys would do it, but it was the way he did it.