leaves curlin up

i have noticed just today that i have leaves curling upwards
not sure if its a nute problem, or what. this is only happening
my white widows. everyone gets the same nutes,molassas,h2o.
each photo is of a different plant, each a widow.
are the widows that much different from everyone else? (first time widower)
have been lookin forward to these for a while, don't want anything to happen now.
thanx for any advice

Heat stress, you need to mist your plants the heat is too high, move your lights further away from your plans and if you have an osc fan heavy on ur plants cut it out - ur plants have no moisture

deffo heat stress

Yea what are you using for light and how far away is it/they?

400 m/h 20 inches away. others are closer to the lights. these plants are closer to the center of room. all fans are on outer corners

. moisture meter says we good . i did raise the just about 6 more inches and gave them a little epson . new pics 2maro

thanks

if ur fans arnt right next to the MH it will get real hot