It is a warning of a possible heat-related emergency. It is a more severe condition than heat cramps. It often affects athletes, fire fighters, construction workers and factory workers. Its signals include cool, moist, pale, or flushed skin, headache, nausea, dizziness, weakness, and exhaustion. It is the least common but most severe heat emergency.
Heat stroke develops when the body systems are overwhelmed by heat and begin to stop functioning.
Signals of heat stroke include red, hot, dry skin, changes in consciousness, rapid, weak pulse, and rapid, shallow breathing.