Water is not optional. It is fundamental to human survival and to nearly every biological process that keeps patients stable and safe. Yet dehydration remains a serious and often underestimated health risk in the United States, contributing to an estimated 10,000 deaths each year.

For nurses and other healthcare professionals, hydration is more than a wellness talking point. It is a daily clinical concern that affects cognition, cardiovascular stability, kidney function, and recovery. Guidance shared by Elizabeth Granado, an athletic trainer with UHealth – University of Miami Health System, offers clear, practical insights that can help clinicians better assess hydration risk and support patients across care settings.

Why Hydration Matters Clinically

Roughly 60 percent of the human body is made up of water. Adequate hydration supports temperature regulation, nutrient transport, and normal cellular function. When fluid levels drop, body systems begin to suffer.

Symptoms of dehydration can include extreme thirst, dark yellow urine, headache, dizziness, and confusion. As dehydration worsens, patients may experience a rapid heartbeat, fatigue, confusion, and decreased or absent urine output, all of which signal a dangerous state.

How Much Water Is Enough

There is no single universal intake that fits everyone. General daily guidelines are about 2.7 liters (91 ounces) for women and 3.7 liters (125 ounces) for men. This total includes all fluids consumed, such as water, tea, coffee, and juice.

A simple clinical rule applies across populations. Drink when thirsty and adjust intake based on sweat loss, physical activity, and heat exposure. Urine color is also a useful indicator. Pale yellow urine typically reflects adequate hydration.

For children, daily fluid needs are lower, at approximately 1.9 liters (about 64 ounces) per day.

Hydration is a clinical necessity, not a lifestyle trend. Nurses can assess hydration status by monitoring urine color, thirst, confusion, and fluid intake, and by encouraging balanced water and electrolyte replacement to prevent dehydration-related complications.

The Risk of Drinking Too Much Water

Overhydration can also be dangerous. Drinking excessive amounts of water in a short period can lead to water intoxication, also known as hyponatremia. This condition occurs when excess water dilutes sodium levels in the blood.

Sodium is essential for neurological function and fluid balance. When sodium levels drop, cells can swell and burst, leading to symptoms such as headache, nausea, confusion, seizures, and, in severe cases, coma.

Why Electrolytes Matter

Electrolytes are charged minerals that help regulate fluid movement in and out of cells, nerve signaling, and muscle activity, including the heart. When electrolytes are depleted, body systems begin to deteriorate.

Signs of electrolyte loss can include dry mouth, fatigue, intense thirst, rapid heartbeat, confusion, and reduced urine output. Without intervention, these symptoms can escalate quickly.

What To Do When Dehydration Is Identified

When dehydration is suspected, the first step is to begin fluid replacement. Electrolytes should also be included to support ongoing physiological function.

Options mentioned include electrolyte drinks such as Pedialyte and Gatorade, potassium-rich foods like bananas, and salt tablets, which can provide electrolytes rapidly when needed.

Hydration and Physical Activity

Fluid intake should occur before, during, and after physical activity. One to two hours before exercise, individuals should drink one to two cups of water without overfilling the stomach. For activities lasting more than 30 minutes, fluids should be consumed during exercise. After activity, fluids should be replenished to replace losses from sweat.

Food-Based Hydration Options

Hydration does not come only from beverages. Many fruits and vegetables have high water content and can support fluid intake.

Fruits with high water concentration include watermelon, honeydew, cantaloupe, strawberries, citrus fruits, pineapple, and grapes. Vegetables such as cucumbers, lettuce, radishes, celery, cabbage, and tomatoes also contribute meaningfully to hydration.

Practical Hydration Tips for Nurses and Healthcare Professionals

Based on this guidance, clinicians can take several evidence-informed steps to help protect patients from dehydration:

• Monitor urine color and output as routine hydration indicators

• Assess thirst, dizziness, confusion, and fatigue during patient checks

• Encourage fluids that include electrolytes when patients are at risk

• Educate patients that hydration includes fluids and water-rich foods

• Remind active or heat-exposed patients to hydrate before, during, and after exertion

• Watch for signs of overhydration and electrolyte imbalance, not just dehydration

Hydration is one of the simplest interventions available in healthcare, yet its impact on patient outcomes is profound. For nurses, keeping hydration top of mind can prevent complications, support recovery, and save lives.