very cool shot outside of the challenge. i love the shallow DOF and the detail in the near dandelion. the border works out nicely as well. it does not fit challenge though.
I think the heat is over in this reproductive process! I would have concentrated on just one dandelion and tried to clear out most of the background -- there is just too much clutter.
I find the yellow distracting, and having a yellow border only makes the flower in the background stand out more. This doesn't say "heat" to me. I think I would like it better if the front dandelion was against a solid background.
The title is homorous in conection to the image but on its one you´ll have to strech a litle far to see the expression of heat. Still the composition is fine and it seem technically very good.