Still sounds implausible and far fetched. Why would you be outside without adequate clothing? (Also below zero can be fine in jeans and sweatshirt if the sun is shining and there isn’t much wind). And in that case it would be more a heat issue and less like a shelter issue.
The other case also sounds more like a heat/water issue and less like a shelter issue.
That one is about extremes.
If you are in sub zero Celsius temps without proper clothing three hours is plenty to kill you especially if there is windchill in play.
On the other extreme three hours in full sun with a heat index above 40 can cause heat stroke or dehydrate you enough to be deadly as well.
Still sounds implausible and far fetched. Why would you be outside without adequate clothing? (Also below zero can be fine in jeans and sweatshirt if the sun is shining and there isn’t much wind). And in that case it would be more a heat issue and less like a shelter issue.
The other case also sounds more like a heat/water issue and less like a shelter issue.
“3s for survival” “why would you be in a survival situation”
Why would you be outside without having eaten in 3 weeks? Or drunk water for 3 days?