What are some symptoms of heat-related illnesses?

The presence of symptoms such as dizziness, nausea, or loss of consciousness directly indicates a heat-related illness, which can include conditions like heat exhaustion or heat stroke. These symptoms arise because the body's temperature regulation can become overwhelmed during exposure to high heat, leading to an impaired ability to cool down.

When the body overheats, it may not only cause a loss of fluids through excessive sweating but also result in diminished blood flow to the brain, resulting in dizziness or fainting. Nausea is a common response as the body struggles to cope with its elevated temperature. Loss of consciousness may occur in severe cases, showing the seriousness of heat-related illnesses. Understanding these symptoms is essential for recognizing the onset of heat illness and responding appropriately to prevent severe consequences.

In contrast, the other provided options do not typically align with the common symptoms seen in heat-related illnesses. Options that suggest joint pain, headaches not related specifically to dehydration or heat, or increased appetite and thirst do not directly correlate with the physiological responses associated with heat stress.