Sad situation.
I have spent a lot of time in the outdoors. It’s important that you know in advance what you’re going to do in the event of an emergency. You won’t make good decisions under stress.
Case in point. I was hiking/mountain climbing in Baxter State Park in Maine in an area I was not familiar with. This was before cell phones. It was an unusually warm day in the 90’s in Maine. I only took one 16 oz bottle of water with me because there was three water sources along my 15 mile route. As luck would have it, all three water sources were dry and this was a tough hike with lots of elevation gains. I ended up lost and in the latter stages of heat stroke where you vomit, shiver and are mentally confused. I was shivering horribly and felt like I was freezing. I wanted to sit out in the sun to warm up, but because I had prepared myself for what to do in the case of heat stroke, I knew being cold was a symptom of heat stroke and I needed to stop moving and get into the shade. I had a very loud whistle with me and started blowing it every few minutes. Two men hiking about quarter mile away left the trail they were following to investigate the whistling noise. They found me, gave me water, got me upright and helped me down. Had I listened to my body and sat out in the sun to warm up and didn’t have a whistle with me, I would have likely died that day.