Clawed and Twisted Leaves

Hi all

I have a problem with 5 of the 10 plants in my growroom as u can see in the pics ive posted
Im growing in soil with a 600 HPS LIGHT but have turned off the extraction due to cold weather to try and keep the temp up.I have'nt used any
nutes yet as the soil im using has feed for 4 weeks in and im 2 weeks into flowering,any help would be appreciated.

They are too dry, or too hot...so either way it is heat stress...so definitely don't turn off the fan...

Some like it HOT.. Some don't!
Looks to hot...plant tops drying out.

if your Leaves curl up it means they are too hot or too dry...leaves curl down means too much water, or that you have just watered..those leaves won't get better, but it won't happen to any others.

Thanks for the quick response guys
I have a fan moving air across the canopy to cool the heat, the extraction is attached to my filter but is dropping the temp by at least 10 degrees
so ithought it may have been the cold that was the problem

Will the leaf damage screw up the grow?or my lil ladies gonna be ok?

Move that bulb up, poor lady is getting her ass burned.

Moved the light up another 6 inches from the canopy,it didnt seem too close as i held my hand between the top of the plants and the light
and it wasnt hot at all.

Using Batmix soil which the growshop recommended so im gonna go see the mofo tomorrow and hear wot he has to say but i know people that have used this
without any problem,intake and extraction are both goin back on.

Thanks guys an gals your help is much appreciated