Just checking because if you leave the key on, the ignition and fuel pump can be energized and overheat as it sits.
If it's mechanical, make sure the pump isn't loose (been there, makes a racket though).
I had a lot of similar heat issues with my edelbrock carb while in Vegas, especially as Temps rose, was never an issue when highs were under 80.
I added a thick insulating Gasket and even wrapped my fuel lines - made no difference for me. Always seemed like the headers and cam conspired to keep my engine compartment hot. The bowls would always be dry everytime I shut off the engine for more than a couple minutes and would take several long cranks to get it started again - an electric pump could actually help but make sure it's not just a parts store special.