Interesting discussion, in particular Bart's analysis. My histogram came from LR, which uses what I understand to be an enormous colour space internally. My LuLa preset has it convert to sRGB, which I imagine must have rather less headroom in the reds.
Here's a version with the colour temperature reduced in LR by 1,600 degrees. It hurts the eyes a bit less, I concede.
Jeremy
PS: Peter, you are of course right.