The problem is compounded when high humidity is added to the situation. The more moisture already present in the air, the more difficult it is for sweat to evaporate. That's why in instances of high humidity, one may feel more uncomfortable than if the temperature is higher and the humidity is lower. The temperature doesn't have to be hot for these conditions to occur. They can occur in a confined area with little or no air circulation or when one wears protective equipment, which can increase workload and restrict movement.
Cramps usually occur in the legs, arms and abdomen.
Stop activity, and sit in a cool place. Drink water and liquids, such as sports beverages. Seek medical attention if cramps are not gone in one hour. Move to a cool place, lie down with feet elevated and drink fluids such as sports beverages. Seek medical attention when symptoms are severe or not gone in one hour.