Which of the following are signs of a heat-related illness?

The signs of a heat-related illness typically include symptoms such as excessive sweating, weakness, dizziness, and nausea. These symptoms indicate that the body is struggling to cool itself in response to high temperatures or prolonged exposure to heat. When the body overheats, it loses its ability to regulate temperature effectively, leading to these distinct signs of distress.

Excessive sweating is the body's primary method of cooling, and if it's accompanied by weakness or dizziness, it suggests that dehydration may be occurring, often exacerbated by the loss of fluids and electrolytes. Nausea is another common symptom related to heat illnesses, indicating that the body’s systems are overwhelmed. Recognizing these signs early is crucial for prevention and timely treatment of heat-related conditions, such as heat exhaustion or heat stroke.

The other options present symptoms that are more indicative of different medical issues unrelated to heat stress. For instance, cold hands and shivering are more indicative of cold exposure or hypothermia, while high fever and chills usually suggest an infection. Frequent urination and headaches, while they may occur in dehydration scenarios, do not manifest specifically as signs of heat-related illness.