What are the signs of heat stress that workers should be aware of?

The signs of heat stress that workers should be aware of include dizziness, headache, and excessive sweating. These symptoms are directly related to the body's response to rising temperatures and increased physical exertion in hot conditions. When the body overheats, it attempts to cool down through perspiration. However, if overheating continues, it can lead to dizziness and headaches, indicating that the body may be struggling to maintain a stable internal temperature. Recognizing these warning signs is crucial for timely intervention to prevent more severe heat-related illnesses, such as heat exhaustion or heat stroke.

The other options mention symptoms that are not typical indicators of heat stress. For instance, excessive coughing and sneezing are more associated with respiratory issues rather than heat-related conditions. An increased heart rate and cold skin may indicate a different medical issue rather than heat stress, which usually presents with warm, clammy skin. Similarly, nausea and chills can occur due to various health concerns but are not primary indicators of heat stress. Understanding the specific signs associated with heat stress allows workers to react appropriately and take preventive measures, ensuring their safety in hot working environments.