Which two measures relate to human discomfort concerning temperature?

The combination of Heat Index and Wind Chill specifically addresses human discomfort due to temperature variations. The Heat Index quantifies how hot it feels by incorporating both the actual air temperature and the relative humidity. When humidity levels are high, the body's ability to cool itself through sweating is diminished, making it feel warmer than the actual temperature. On the other hand, Wind Chill measures how cold it feels outside when wind is taken into account alongside the actual temperature. When the wind blows, it removes heat from the body more quickly, leading to a lower perceived temperature. Thus, both Heat Index and Wind Chill serve as crucial indicators of thermal comfort, directly relating to how human beings perceive temperature and experience discomfort in varying conditions. These concepts help in anticipating the health impacts of weather on people, emphasizing the importance of accurate measures for comfort in different climates.