Mushy Phal Leaves?

[butterfly_muse]

Good afternoon, everyone! I have come home today to find my baby orchid has a mushy leaf and all of its other leaves are limp. I don't know what happened, the plant was totally happy just yesterday!

Just a back story on this orchid in case it helps - I brought it home and it had very few viable roots left; I repotted it in a small pot, new bark medium, and I dunked the entire plant in some KLN to encourage it to grow roots. I have always soaked it when it was dry and it seemed very happy. It had nice crisp leaves and was seeming to improve.

And then today...=(

It has been in the 80s this week and reached 88 yesterday. I had the orchids outside (brought them in at night) in indirect light to enjoy the humidity and warmth..today I didn't move this one outside because of its leaf, though.

What is this? What should I do?

Edit: I just noticed one of my larger phals is getting this way too on its bottom leaves; They are limp and getting wrinkled...Is this a response to the heat? Is it a response to going outside to a hot, humid environment and then being brought in to the air conditioned, less humid house? =\ I think I will just leave them inside from now on...