Heat Stress and Human Response Visual Guide #277759 (License: Personal Use)

The image depicts five stylized stick figures standing beneath a radiant sun with directional heat rays. From left to right, their expressions and physiological cues evolve: neutral → smiling → joyful with raised arms → slightly flushed → visibly sweating and distressed in red. This visual progression effectively communicates escalating thermal stress levels in an accessible, educational format.

Commonly used in public health campaigns, occupational safety training, climate change communication, and educational materials to illustrate heat-related illness risk and the need for preventive measures like hydration, shade, and rest.