Which symptoms are indicative of heat-related illness?

The presence of dizziness, headache, and nausea is indicative of heat-related illness, particularly heat exhaustion or heat stroke. When the body is exposed to high temperatures for an extended period, it struggles to regulate its temperature, leading to various symptoms. Dizziness can result from dehydration and reduced blood flow to the brain, headache often indicates dehydration or overheating, and nausea may be a response to overheating or stress on the body.

These symptoms reflect the physiological response to excessive heat, making them critical indicators for urgent attention and potential treatment. Recognizing these signs is essential for prompt intervention to prevent the progression of heat-related illnesses, which can be life-threatening if not addressed.

In contrast, the other options mention symptoms that are associated with different types of conditions, such as chills and tremors, which typically indicate a cold-related issue or infection, and fatigue and loss of appetite could suggest a variety of other health concerns. Skin rashes and itching are not associated with heat-related illnesses but are more indicative of allergic reactions or skin conditions. Thus, the symptoms in the correct answer align specifically with the effects of excessive heat exposure on the body.