Sun damage?

I have a problem with some damage I think (hopefully) was caused by the sun. It was a very warm 91 degree day at 1pm when we had a sudden downpour and the sun came out immediately after. Can anyone tell if this is the effect? Thanks.


Come on fellas... Somebody has to have an opinion! Help...

Thanks for ALL your replies! Helped me Eminence!.

Looks like heat stress to me.