heat burn?

Hello So 35 is definitely high for these babies...especially if they haven't been acclimated to the outdoors (spent most of their life nonstop in rising and falling heat). The leaves that are cupping up like canoes is a good indicator of high heat stress... but it seems like there is more happening. The discoloration in between the veins, possibly magnesium deficiency, but often down to ph problems. The yellowing on the tips is spreading up pretty far and going along the edges also so not a typical nute burn... I think my best advice is double check the ph, ingoing and the runoff, and maybe recalibrate the pen to double check it's accurate. Try to keep it out of the heat and see if any positive changes happen. And maybe do a mild flush and then come in with a low dose of nutrients too. I'm thrown off by only 1 of the plants being this way if they all have an identical environment. Good luck with the hunt for the problem. ✌️