Nice tree.
I have experimented with fuchsia a bit here in New Jersey, and have come to the conclusion that most of the varieties I have tried (both as potted plants, and as bonsai) have difficulty with the heat (90 degrees plus) here in the summer.
In Montreal, at the Jardin Botanique (in pots), when the temperatures got high, they watered them copiously. As a coolant, perhaps?
Any ideas?