What are signs of heat stress to look for in workers?

The correct answer highlights the symptoms that indicate a worker may be experiencing heat stress. Headache, dizziness, and muscle cramps are all physical manifestations of the body's struggle to cope with excessive heat.

When the body overheats, it can lead to dehydration and electrolyte imbalances, which contribute to these symptoms. Recognizing these signs is critical for preventing more severe conditions such as heat exhaustion or heat stroke. These symptoms can escalate quickly and pose serious health risks if not addressed promptly.

In contrast, fatigue and low morale, while concerning, do not specifically indicate heat stress. Increased productivity is actually not a sign of heat stress; in fact, heat stress often leads to decreased performance and efficiency. Loss of appetite can be a general response to many health issues, but it is not as direct a symptom of heat stress as headaches, dizziness, and muscle cramps. Thus, the focus on specific, physical symptoms makes this answer the most appropriate in identifying heat stress in workers.