Read other letters about this article
No, it is up to the race folks to ensure a safe race, that is why the runners fork over the cash... to be taken care of, to know that water will be provided, that they will not have to fear being run over by cars, or whatever the case be. It is unfortunate for someone to die for this to be apparent that Chicago was not prepared, but should raise flags to any other races, it is better to be overprepared than face the obvious panic that being unprepared unleashes.
Yes, it was hot, yes, it was humid.... but how do you run out of water at mile 4? How does no one notice a runner in distress? Why do you shut down a race halfway through? Why not just state, OK, here's what happened, if you want to finish, that is up to you, but you are on your own, but if something does happen, we aren't liable.
Sadly, in the future, the fine print on a race application is going to be a lot longer, and you won't see increased turnout... I would even bet they require some sort of Doctor (I mean Health Insurance Rep) ok to race.