It's not dead yet, there were some burnt tips and burnt base, but if it's not spreading, it's fine, and don't frag the burnt area because it may introduce new wounds. If it's spreading then you need to frag it, and hope for the best.
Try to keep your water condition as stable and as pristine as possible, give it some good flow and descent light, it'll recover.
Normally if the burnt area isn't spreading, I'd wait until the wound is fully recovered (i.e. the burnt tip start having coraline algae), then snap those end off to let it fully heal and cover the burnt area.