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    It's not the heat that does it, it's solar radiation. It will work itself out in its own way. Those leaves will eventually drop. In the mean time, just give them a few hours at a time of direct sunlight - increasing exposure a bit every few days.
    Full outdoor exposure is a lot harder on plants than indoor life. They need to be hardened off to sunlight, wind, changing humidity, pests... It takes some time for plants to toughen up and get used to it.