possible heat stressed plant?

My plant shows heat stress I guess. I left it for 1 week and my termometer was showing max temp at 35C but need to double check tonight. Normally I would water it every 3 days but this time it keep moist for whole week. Old leaves are curling and yellowing but feel normal to touch/ not soft. Ph is fine, no overnute, plant is 4 week into flower, its flying dragon.

Question is am I right and what can I do besides dropping temp to help the plant to finish.

I'm not sure about the thermometer (will buy new one) it was showing 9C in my fridge that is working fine. Plant is in a box 180 cm high with square 60 cm floor and exhaust 70cfm fan that you can feel blowing hot air out. Its under 250W red cfl. Its planted in 50/50 pot plant compost and vermiculite.

drop the temps and give it a little superthrive or B-vitamins. good luck and keep us posted!

More ventilation less heat. Try foliar spraying with water, just dont foliar spray when your lights have been on for over an hour. I spray my plants after my lights go off but I guess people have had success spraying as the lights are turning on. Id try it while your lights are turning on since your using indoor soils which have a tendency to stagnate especially if your using compost instead of liquid fertlizers.