As the sun'd angle changes, it managed to shine directly into my grow chamber the last few days without me noticing. Some of my orchids are very sunburned looking. Is there any way to come back from this?
sad to say, you cant do anything with sunburn=it looks really nasty and ugly even if you have magnificent blooms=observe the burnt area it might harbor fungi/bacteria infestation(spray it with antifungal/antibacterial to rule out any of these)....hopefully the plant will produce more leaves and the burnt ones will just fall off then you will have a perfectly healthy orchid plant
If it's just some foliage that burned, the plants should be ok - tho, as Bud said, keep an eye on things.
Small plants, plants too hot and/or dry, can cook to death tho, and might not even show the full extent of the damage for several days ... (it's happened to me)
Hopefully that isn't the case for yours. Let us know how they go, please?