Here are two visualizations of election turnout in Shelby County, pulling from the Voters tab on the SCEC unofficial results page. One is shaded by percent turnout and the other by number of ballots cast. Renderings performed by Muse.
August vs November turnout, in a nutshell.
According to the Shelby County Election commission:
Of the 129,720 voters who participated in the Shelby County Mayoral election in August, 86,321 voted early.
125,313 early votes have been cast through Monday for November 3.