Drying out or something worse?

[Stranger]

Recently my N. maxima (wavy leaf) has taken a pretty big downturn in health. Here's what it looks like at the moment:

I should've taken some earlier pictures, but some of the leaves started turning brown from the vein outwards, others from the edge inwards.

We've had a bit of a heatwave recently, but the rest of my other plants look fine and the maxima has typically been quite hardy. Is this just heat, or something else?

 

[zcons]

Can't say for certain, but given how dry the orchid bark looks, it definitely could have dried out a bit. It seems you have 2 different growth points. The one on the right may be able to be saved!

 

[Stranger]

Thanks, the orchid bark is just a covering (pure LFS underneath) but it has been rather dry around here recently.

Both growth points are good for now, let's hope they stay that way!