FINALLY! Some "cool" air, but how long will it last?

  Saturday and Sunday marked the hottest temperatures we've seen so far this year at the official reporting site, DFW airport: it was 103 both days.  On June 26 and 27, 1980, we hit the hottest temperatures ever recorded here: 113, so I guess you could argue that it could be worse.  Still, this is only the beginning of summer, and it typically hits 100 or better 16 days each summer.  So far, we've had 5 triple digit days.  11 more to go  :)
  The average first 100 degree day is July 1, so we weren't too far off this year.  Once it hits 100, people start asking when the heat will end.  We've hit 100 as late as Oct 3, 1951 when it was 106!  My personal rule of thumb is that we don't really cool off until the Great State Fair of Texas comes to an end.  This year, it ends on October 18.