My ex did this to me. I got heat stroke and she left me behind on the mountain. Wanted to get back to the truck for cell service cuz addicted to phone and didn't want to wait for me.
I spent hours sitting by an alpine stream filtering and drinking water and I ended up hiking out in the dark while occasionally projectile vomiting. It's the first time and only time I thought about pressing my garmin SOS button.
And the only reason I got sick was because I was on new medication that killed my heat tolerance I was pushing myself too hard to keep up to her to fend off the incoming conflict. Was being called "out of shape" and "unhealthy" the entire ascent. If I was alone I would have taken it slow and never ended up in this situation.