It's too hot to get heatstroke. What is the stressor?

Physical stress. When the weather is overheated and the body is exposed to the high temperature environment, there will be problems such as overheating, water loss and thermoregulation disorder, which will lead to heatstroke. Heatstroke is a stress response of human body to high temperature and a natural stress response of human body to high temperature environment. Appropriate measures should be taken in time to cool down and protect health.