The user fired several thousand shots over 3 hours according to follow up posts, and also spent a fair amount of time reviewing images.
As a point of comparison: Last year in Thailand I also had my A7r III overheat under similar circumstances. 80-85f, shooting under a canopy, pretty humid, tracking birds and macaques, waiting for a great hornbill that never came for 2 hours, camera became unstable and started locking up, requiring me to pull batteries, eventually after enough problems it shut down.
Also the user even went on to clarify that the conditions were even worse than they stated in their original post:
It was very humid.
Camera in hand for many hours.
Camera never was turned off, auto power off set to 1 minute but several thousand frames shot and lots of reviewing.
Heat index was 94.
Sun was directly on the camera.
