While things will remain warm and sticky, there is relief coming next week, albeit short-term. We are looking at Wednesday morning lows, for the 18th. Not freezing cold, but a bit on the chilly side for this time of year. From hot to chilly, rather quickly.
Now taking a look here locally in the Carolinas, including Charlotte, we will see temperatures as low as the 40s next Wednesday morning the 18th. The mountains will of course have some temperatures that dip down to the lowest in the area. Temperatures will generally be in the 30-50F ballpark across the forecast region.