Exactly!
Your plants are showing two of the three most common symptoms of heat stress: Upcurled edges from a high temperature:humidity ratio, and actual burn patterns on the leaves where what would have been a mild fertilizer problem has turned into necrotic burned areas. The last symptom would be an overal yellowing of the plants.

Fill out the troubleshooting form, and tell us as much as you can about how your room and exhaust is conficgured, and the lights.
Finally, can you get a close-up of the curled-UNDER leaves in pic #1? There are two or even three things going on there (heat, a possible Mg issue, and the possibility tyhat the plant is either rootbound or N overdosed) and we can figure it out with more information.
You're close to harvest I see so it will mostly be heads up kind of info for next time. Honestly the plnats look like they had been doing very well for a long time.