According the Rule of 3, Which Do You Need to Get First When Stranded in a Harsh Environment?
According to the Rule of 3 for survival, you can only last 3 hours in a harsh environment without shelter. But, you can last 3 days without water, and 3 weeks without food. And, not that timing it will help you much if you’re in this situation, but you can only last for 3 minutes without air. So, although you definitely want to signal for help, make sure you have a shelter to retreat to in case assistance doesn’t arrive in time.