We get people down in SWFL (either as 'Snow Birds or tourists) and when someone ultimately calls 911 for a 'heat illness', they are stunned to find out that in the tropics/sub tropics, they can sweat 4 litres in 1 hour! I usually tell them this after they have answered the question...Have you been drinking water throughout (what ever it is they said they were doing)? Oh yes they tell me...I've had 3 glasses since I began to (work) in the heat 3 hours ago......! It is at this point that they realize just how far behind the 8 ball they really are.