Rare medical term for heat exhaustion. In modern Japanese, 熱疲労 (ねつひろう) is the standard word. This form may appear in older or specialized texts.
See also: 熱疲労
Heat exhaustion is considered a form of dehydration caused by excessive sweating in high-temperature environments.
In old medical books, the notation 熱疲憊 can be seen, but nowadays 熱疲労 is common.
A broader term for heat-related illness, including heat exhaustion and heat stroke.
Compound of 熱 (heat) and 疲憊 (exhaustion). The second character 憊 is a non-jōyō kanji meaning 'tiredness' or 'fatigue'. The term is a direct calque of English 'heat exhaustion', likely introduced in medical literature.