Sun damaged orchids

[aramina12]

It got to almost 105 degrees two days in a row and since I was working a lot, I didn't notice the affect it was having on my orchids. One of them, a miniature phal, has yellowing on almost every leaf now, but the leaves aren't shriveled. My dendrobium also has slight discoloration in quite a few leaves (just a lighter green).

I'm guessing there's no way to actually REVERSE the damage, but I was wondering how I could prevent it in the future. I have a sheer curtain on the window I keep my orchids in front of. Would closing that be enough on hotter days or should I actually move them?

All my orchids are by an east window.

[Cym Ladye]

No, you cannot reverse the sunburn, but ABSOLUTELY PULL THE CURTAIN. You might also consider moving them on days that you know are due to be intensely hot.

[WhiteRabbit]

I have some orchids that get afternoon sun, and when I know it will be very hot, I move them. Better they get little light for a bit, than cooking them. Don't beat yourself up - it happens - I have a few times not realized how hot it was going to be and ended up with quite burned orchids.

[musicts]

How warm does it have to be for them to burn?