Hey Perry, have  you tried some S-caps or E-caps?  I bet you've acclimated  to the temps as much as you're going to by now.  I sweat like a fiend out there now.  I don't always take them but find I do  benefit from them during some runs.  Whenever I run with someone else it ends up being faster than I would  go if alone.  I used  them at Kirksville and ran pretty strong for me.  Full sun can take it out of you but I wonder if some of the afterglow you're getting is due in  part  to being low on electrolytes?

Yeah, I guess that's a possibility, although if just sunburn gives a headache as well, without all the sweat depletion, there might be something else going on.

3.25 miles @ HP