Dr Michael Mosley missing on Greek Island | Body found (p 9)

He probably had heat stroke rather than dehydration. Folk with heat stroke are often not dehydrated, it's a bit of a myth.
Heatstroke fucks you right up.

I've had it once when working in Africa, and by all accounts I was all over the place, even though I though I was fine enough to carry on working. Mine was combined with dehydration, due to grafting in the midday sun in over 45 degree heat (due to the reflected heat from the concrete) and high humidity due to the proximity to the edge of a jungle. We physically couldn't drink enough water and our body salts were seriously depleted.
 
Heatstroke fucks you right up.

I've had it once when working in Africa, and by all accounts I was all over the place, even though I though I was fine enough to carry on working. Mine was combined with dehydration, due to grafting in the midday sun in over 45 degree heat (due to the reflected heat from the concrete) and high humidity due to the proximity to the edge of a jungle. We physically couldn't drink enough water and our body salts were seriously depleted.
It does indeed fuck you up a mate of mine ended up on a ventilator in ICU during a shortish run.
But the problem is the heat rather than the dehydration which is rarely severe in heat stroke.
 
It does indeed fuck you up a mate of mine ended up on a ventilator in ICU during a shortish run.
But the problem is the heat rather than the dehydration which is rarely severe in heat stroke.
Raised core body temperature is the main issue for sure. A rise in core temperature really creeps up on you, and then when it tips the threshold you usually have a rapid onset of symptoms which are hugely disorientating. By raising your core temperature too high you effectively disable your body's thermostat, at which point you get the biological equivalent of thermal runaway. Temperature regulates so many bodily functions which is why systemic organ failure usually follows quickly if left untreated.

Acclimatisation is often overlooked, and short holidays to hot places can be a real problem for the old, young or unfit/unwell.
 

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