There's a good chance DFW will hit 100*F again today.
After today, we'll be 1 day short of tying 1998 for the 3rd most 100*F+ days in a year, and surpass 2000 for the most 100*F+ days in September.
EDIT: Depending on the evolution of convection throughout the day, today may be the latest 80*F+ low ever observed in the season as well.