I think that unfortunately, this kind of stuff happens a lot more than we realize however, it is not in the media spotlight. Case in point was the summer of 2001. That was the "summer of the shark". It seemed like everyone was getting attacked by sharks. Shark attacks were actually higher in the summer of 2000 but there was no media coverage so life went on. The media grabs it in 2001 and now sharks are everywhere.
Fast forward to this unfortunate accident, you now have the media hunting down every single bridge, waterway incident.