Was HOT, HOT, HOT.  A heat index of over 109.  We made sure all riders were supplied with lots of water and wet rags to cool them off.  We were lucky and only had one rider that had any severe reactions to the heat and we got her hydrated and cooled off and she was able to ride her bike back (didn't hurt anyone either that we stopped in Olney, TX at the Dairy Queen for some more cooling off).