This number, 600 deaths or what ever it was, was hyperbole. You need to understand the news market here in Chicago. This place lives for a big rain, or snow fall, or cold weather. Local reporters are always standing outside O'Hare airport reporting on the snow fall, or by the Eisenhower Expressway videotaping the salt trucks as they ply the area roads.
During the heat wave of 1995, news reports showed dead bodies being lifted in coroner vans. Ten years later, even with all the killings and murders that take place in Chicago, (648 in 2002, fewer now) those scenes don't make it on the ten o' clock news.
Yeah, I was living there too. I've lived thru much hotter summers in Iowa. The news media was on a feeding frenzy to make money and hyped everyone into a state of fear. Most of those people died because they shut their windows and had no AC.