Heat stroke is even more serious, as it can kill. Occurring when the body temperature exceeds 41°C, the patient suffers from headache, nausea, vomiting, confusion and finally coma. The skin is hot and dry because the sweating process is halted by inflammation of the sweat glands, known as 'prickly heat'.
Added factors are windless, humid climates, old age and alcohol. You can treat heat stroke by rapid cooling with cold water or ice packs. Re-hydration by lots of fluid is less likely to have occurred. Also, make sure you seek urgent medical advice for someone in this condition.
The golden rule is to treat the sun with respect. Although it is a great relaxer, rejuvenating force and lifter of 'the blues', it can also be very dangerous. Keep cool and drink plenty.
Many articles taken from 'A word with the doctor', by Dr. John Windsor.