Cattleya heat or insect damage

[whitepine84]

Good morning,

I have a cattleya that I've owned for over a year now. It's been in the same location for most of that time and has done really well - it's added a new bulb, lots of leaves, and it flowered last spring. A few weeks ago I noticed some strange bumps on the leaves of part of the plant. It's not scale as far as I can tell because I can't scrape them off with my fingernail. Now, I've noticed two of the leaves on top are turning darker and getting wrinkly. Another consideration is that yesterday the heater ran all day in my classroom and it was super hot - Another BLC looks pretty beat up and shriveled, and a Potinara looks like it was damaged as well. What do you think the problem is, insects or heat?

Shared album - Zachary Johnson - Google Photos
Shared album - Zachary Johnson - Google Photos