I think this image will never give the impression being hot because it was taken in shade. You need sharp shadows if you want to convey the sensation of hot. Raising contrast would not work IMHO. Actually the contrast is IMO already too high (both burned* highlights and blocked shadows in a low subject brightness range scene).

I would print it without burning - blocking, keeping sand details under the people feet and bush - rock- palm detail on the right.

* "burned" as in "clipped"