You can look at a leaf symptom chart as well as anyone. There's a few 'maybes'.
mg-def
k-tox
ptox or def
Some immobile/less mobile nute, if it is nute-related, with similar symptoms. A lot of them can cause tip burn - even some deficiencies.
When you can't be confident, be patient. If you can appy greater info/knowledge in person compared to these pictures, you can eliminate possibilities and make a more educated guess than someone can with what is provided in this grow question. LEaf symptoms are not often discrete. You almost always have to eliminate other possibilities. Being systematic about how you do things can help greatly. Fewer moving parts = easier diagnosis.
I don't think heat or some combination of heat and low RH (high vpd) is the cause here. Unless you recently moved the plant from inside to the sun - and even then the damage would start at the top.
bright side -- it's slow moving. Take your time. Don't do anything too drastic without being confident. Some stuff yuo can do that isn't intrusive, like ph-check the runoff... probably limited options in regard to heat, if outside, lol, but you get the point.