Maybe it is the only spot he has
I think you should try for Highbush Blue berry
not because of heat just because it gets big , and you get a good amount of berries
also Being big Could deflect the heat, but they have blueberries in Florida (also Sparkle berry)
I would not worry about it , but really I do not know
seems pretty indestructable blue berries.
Some people are pretty crafty here
Could he place something to absorb the heat (heatsink) between the plant, and the Bush?
Maybe that ty vec styrofoam , but that might look getto (or that yellow foam from a mattress )