Leaves pointing up a sign of heat problems?

Hmmm...

Actually, in my opinion, leaves pointing up is a sign of health and vigor. Kinda like a boner, eh?

85 - 90 is not a threat to your plants. Although those roots might get real hot in those black containers you have them in.

Also, you have them set fairly deep in the container...might be getting stale air...heat build up...

Get some wind on them or replant so they grow outside the container, not inside of it.