You are correct as is all of Macomb County and where I live which is 18 miles north of the Detroit city limits but I am not in Detroit.........
Had you said Metro-Detroit I would not have made any comment but since you said Detroit, I found it necessary to correct you.
I work in Southfield, but I can throw a stone south into Redford, and another east into Detroit. Ugh. Home base is Waterford, which is good(but Pontiac lurks just a few miles east). At least if SHTF, I know from whence the majority of zombies come!