when its hot plants halt the photosynthesis, or at least stop it by far. They can NOT proccess fertilizers like a plant within the "normal' temperature range and so they become very sensitive to over-feeding.
If you can't fix up more ventilation (Thats how I grow when its 45C outside) go low with the ferts and wait until it gets cooler again.
Another thing to remember is that when air is imobile the hot air goes up and the cold air goes down.
Thats why your intake should take air from floor-level and your exhaust should take the air from over the bulb.
Fans should be put as low as possible directing upward to get the cold air up and not the hot air down.
It does make a difference.
As your plants become weaker due to decrease in photosynthesis they will be much more sensetive to any kind of stress, so try biasing the PH correctly, keep everything clean, lookout for any bugs \ pests and kill them before they oppose any danger and when you see anything weird post it right away.
You should expect getting twisting leaves, some decoloration, lower leaves falling once in a while and overall weakness.
By keeping everything else correct you should be fine though.
Good luck
keep us posted.