Is season 5 postponed

that article appears to be a hoax or releasing fake info, because on the show's official twitter and facebook pages, they state that the S5 premiere will still air on October 11 as planned, the most recent tweet that confirms the Oct 11 premiere date was only posted on twitter about 6 hours ago.

So I wouldn't trust that article...the source looks really fishy to me, I wouldn't give it much credit.

As for the official plot synopsis of "Chicago Fire" premiere episode, TV Guide notes, "In the Season 5 premiere, Kelly Severide (Taylor Kinney) and Stella Kidd (Miranda Rae Mayo) search for Grant (Guy Burnet), who's AWOL from Chicago Med; Dawson questions her career path. Nancy Casey's (Kathleen Quinlan) relationship with his political consultant cools, and Danny Borrelli's (Andy Ahrens) anger at Chief Wallace Boden (Eamonn Walker) over his brother's death boils over. In other events, Randy 'Mouch' McHolland and Sylvie Brett (Kara Killmer) partner on a new venture."