With more than $2 million in production costs on the line, Chicago Mayor Rahm Emanuel's first-ever Great Chicago Fire Festival may get a chilly reception — at least from Mother Nature, always a force to be reckoned with in this city. Indeed, what could wind up being record cold for an early October evening threatens to put a damper (rain is in the forecast too) on what was designed to be a major fall spectacle to attract local residents and tourists. The latest forecast shows daytime temps on Saturday will be lucky to top out at 50 degrees. By the...