Check out these mid-afternoon readings across the southern plains states ... I really don't ever recall seeing this widespread of heat in my lifetime.
Many of these cities are going on 30 or more days of this.
All I can say is thankfully this is more of a desert (dry) airmass .... with dewpoints only in the 50s at most locations ... so there really is little to no heat index for these areas.
Once you get over to around Little Rock ... then it becomes oppressive. Currently 105 with a 74 dewpoint ... making a heat index of 118!
So want to cool off? How about Mt. Washington, NH .... currently 46 degrees with wind and fog!