Certified GKH Gardening Expert
First, I would move it to a shadier location. Then, if freshly scorched, wrap with moist burlap or saran wrap to slow dessication. When bark finishes dying, trim off dead tissue. Keep roots moist and insulated. If only foliage is affected, you can try trimming off the dead/dying foliage. If it's severely burnt, you may not be able to revive the plant.