The temperature at which survival becomes challenging depends on various factors such as individual health, humidity, and duration of exposure. However, researchers have conducted studies to determine the limits of human survival in extreme heat. In one such study, scientists exposed volunteers to increasing temperatures to see how they would cope.
The study found that in dry heat conditions, most healthy individuals can tolerate temperatures up to around 120°F (49°C) for a limited period, such as a few hours. However, prolonged exposure to temperatures above 105°F (41°C) can lead to heat exhaustion or heat stroke, which can be life-threatening.
Humidity also plays a crucial role in determining survivability. High humidity can hinder sweat evaporation and make it harder for the body to cool down, increasing the risk of heat-related illnesses. In extremely humid conditions, temperatures as low as 90°F (32°C) can pose a significant threat to survival.
It is important to note that these temperature limits are approximate and can vary based on an individual’s age, overall health, acclimatization, and access to water and shade. It is always recommended to stay hydrated, avoid prolonged exposure to extreme heat, and seek shelter in cooler environments during hot weather to ensure personal safety.