Heat mark on MBP display and Apple logo?

My 2015 MacBook Pro has developed a strange “heat mark” on the outer shell’s Apple logo. The plastic has actually “bubbled up” and I can feel ridges on the plastic.

The damage has extended to the display itself. There is a dark halo spot directly opposite the damaged side.

This issue seems to have appeared overnight. There was no external heat or pressure applied to the lid.