Just before the green flag went up last July, Chicago’s first NASCAR race through Grant Park seemed all but doomed. Criticism over closed streets and park privatization mounted for months. Canadian wildfire smoke lingered. Lightning canceled concerts and halted an undercard race. And as the backend of a record rain spell drenched drivers walking to the main event’s start, even the professionals wondered aloud if the race would ever happen. But the skies cleared, and all that noise — at least inside the race grounds — faded behind the sounds of car engines roaring down Columbus Drive. By the time the race ended, around 4.8 million viewers had tuned in to see New Zealand’s Shane van Gisbergen win NASCAR’s first city street race in his first NASCAR start.