One of the leading causes of a heat-related illness is dehydration. Dehydration occurs when the body does not get the amount of water it needs to function properly. The body naturally loses water through urination, sweating, crying, spitting, exercising, and breathing. Water can also be lost due to illness (i.e., fever, vomiting, etc.) and taking diuretics. To avoid possible health problems, you must be able to recognize the hazards that can lead to dehydration and know how to protect yourself. Read the information below, and ask yourself if there are actions you can take to keep your body sufficiently hydrated.