What is the least severe treatment for hyperthermia?

Applying lukewarm water as a treatment for hyperthermia is considered the least severe initial measure because it allows the body to cool down gradually without introducing the shock of extreme cold. Hyperthermia occurs when the body's temperature regulation fails, and the core temperature rises, becoming potentially dangerous.

Using lukewarm water helps to foster evaporation and promote heat loss while still being comfortable for the individual. This technique avoids the risks associated with more intense treatments, which might be necessary as hyperthermia worsens but could lead to complications if implemented too early or aggressively.

Other options, such as applying ice packs directly to specific body areas, can be effective but are more invasive and can risk causing a rapid temperature drop, potentially leading to core temperature issues or shock. Transporting the individual to a medical facility can be essential, depending on the severity, but is not a direct treatment method that provides immediate relief. Fanning the individual can help increase air circulation and facilitate cooling but is generally less effective without the addition of moisture from lukewarm water. Thus, spraying with lukewarm water represents a balanced, gentle way to begin the cooling process for someone experiencing hyperthermia.