Cool, moist skin with goose bumps when in the heat
Heavy sweating
Faintness
Dizziness
Fatigue
Weak, rapid pulse
Low blood pressure upon standing
Muscle cramps
Nausea
Headache
Prompt treatment usually prevents heat cramps from progressing to heat exhaustion. You usually can treat heat cramps by drinking fluids or sports drinks containing electrolytes (Gatorade, Powerade, others), getting into cooler temperatures, such as an air-conditioned or shaded place, and resting.
Also, should you be wearing tight or un-breathable clothing, take them off while resting so you can cool down faster. If conditions get worse or are worsening at a rapid rate, such as inability to drink, confusion, fainting, or even seizures…call 911, or you local emergency line. You don’t want that turning into a heat stroke.