Bearing in mind January's horrible event, which has recently been in the news again, I just noticed this definition of "accident" and was rather surprised by the example quoted:-
"An unexpected and undesirable event, especially one resulting in damage or harm: car accidents on icy roads."
I can see that such accidents are undesirable, but surely the very fact that they can be used as an example in a definition must mean that such an accident is not unexpected (as in unforeseen).