Which of the following is a sign of heat stress that linemen should monitor in themselves and others?

Monitoring for signs of heat stress is crucial for linemen who often work in strenuous conditions and are exposed to high temperatures. Confusion and dizziness are significant indicators of heat stress because they suggest that the body is struggling to regulate its temperature and may be experiencing dehydration or heat exhaustion. This impaired cognitive function can lead to mistakes and accidents, making it essential for linemen to recognize these symptoms early.

In contrast, increased appetite does not typically correlate with heat stress; often, the body may actually experience a decreased appetite due to heat. Colorful clothing is unrelated to physiological symptoms of heat stress; while it might be visually appealing, it does not affect one's physical health or body temperature regulation. Improved reaction time would suggest enhanced performance, which is contrary to what might occur under heat stress conditions. Therefore, identifying confusion and dizziness as signs of heat stress helps ensure the safety and well-being of linemen working in challenging environments.