Heat Exhaustion
Heat exhaustion is a milder form of HRI that can develop after several days of exposure to high temperatures and inadequate or unbalanced replacement of fluids. Older adults, those with high blood pressure, and those working or exercising in a hot environment are most prone to heat exhaustion.
The warning signs of heat exhaustion
include
Heavy sweating
Paleness
Muscle cramps
Tiredness
Weakness
Dizziness
Headache
Nausea or vomiting
Fainting
Other possible symptoms include
Cool and moist skin.
Fast and weak pulse rate.
Fast and shallow breathing.