Heat exhaustion:
Pale, cool, clammy skin
Profuse sweating
Body temp 100 - 104 deg.
Dizzy/lightheaded
Heat stroke
Flushed, hot, dry skin
Not sweating due to dehydration
Body temp 105 deg or more
Confusion/fainting/comatose
Hyperventilation
blood pressure abnormally high, OR, abnormally low.
Source:
https://www.emedicinehealth.com/heat...s_are_the_same