I have looked all around the filing cabinet and reference desk and haven't found anything about this so i hope im not doubling up.

In my fic my MC parents die suddenly in an accident while she is still at school. So my questions are
1) Would the Headmaster/Headmistress at the time tell them what had happened or would someone else? Would they get a letter sent to them?
and
2) As magical healing is in many ways more advanced than human medicine what sort of accident would be severe enough to kill someone? Also, the mother and father in question wouldn't be in any kind of muggle contraption so i can't use say airplane crash, but they do both have to be there

Any help would be great thanks.