When temperatures soar, few things feel as refreshing as a glass of ice-cold water. Whether you've just finished exercising, spent time outdoors, or simply walked through the summer heat, reaching for icy water is a common way to cool down.

Contrary to popular myths, drinking cold water is generally safe for most healthy people. In fact, it can help with hydration and may even feel more refreshing than room-temperature water. However, the way you drink ice water—and the circumstances in which you drink it can influence how comfortable you feel afterward.

Certain habits may contribute to temporary discomfort, interfere with effective hydration, or leave you feeling sluggish rather than refreshed. While these mistakes are usually not dangerous for healthy individuals, avoiding them can help you stay hydrated and feel your best during hot weather.

Here are 6 surprisingly common mistakes people make when drinking ice water on hot days.

1. Drinking Ice Water Too Quickly After Intense Heat or Exercise

After spending time in extreme heat or completing vigorous physical activity, it's tempting to gulp down a large glass of ice-cold water immediately.

Although cold water itself is not harmful for most people, drinking a large amount very quickly may cause temporary stomach discomfort in some individuals.

Some people may experience:

• Stomach cramps

• Bloating

• A feeling of fullness

• Mild nausea

• Brain freeze (ice cream headache)

Instead of drinking rapidly, take slow, steady sips over several minutes.

If you've been exercising heavily or sweating a lot, replacing fluids gradually may also improve comfort.

2. Relying Only on Ice Water and Forgetting Electrolytes

Water replaces fluid loss, but heavy sweating also causes your body to lose electrolytes such as:

• Sodium

• Potassium

• Magnesium

• Chloride

If you're outdoors for long periods, participating in endurance exercise, or working in very hot conditions, drinking only plain water may not fully replace everything you've lost.

Depending on the situation, electrolyte-containing beverages or foods may be helpful.

Good options include:

• Oral rehydration solutions (when appropriate)

• Coconut water (contains potassium, though it isn't a complete electrolyte replacement)

• Bananas

• Yogurt

• Watermelon

• Soups

• Balanced meals after exercise

For everyday activities, plain water is usually sufficient.

3. Drinking Ice Water Instead of Hydrating Throughout the Day

Many people wait until they feel extremely thirsty before drinking water.

Unfortunately, thirst often appears after your body has already begun to lose fluids.

Rather than drinking a large amount of ice water all at once, it's generally better to:

• Drink water consistently throughout the day.

• Increase fluid intake before becoming very thirsty.

• Carry a reusable water bottle when outdoors.

Your hydration needs vary depending on:

• Temperature

• Physical activity

• Age

• Health conditions

• Pregnancy or breastfeeding

Checking the color of your urine can provide a rough indication of hydration. Pale yellow urine generally suggests adequate hydration, while darker urine may indicate that you need more fluids.

4. Drinking Ice Water With Large Amounts of Sugary Drinks

Some cold beverages marketed for hot weather contain significant amounts of:

• Added sugar

• Artificial flavorings

• Syrups

• Sweetened condensed milk

• High-calorie toppings

Examples include:

• Sweetened iced teas

• Sugar-sweetened soft drinks

• Some blended coffee beverages

• Frozen desserts in drink form

These beverages may temporarily quench thirst, but consuming them frequently can increase overall sugar intake.

Whenever possible, choose:

• Plain water

• Sparkling water without added sugar

• Unsweetened iced tea

• Infused water with lemon, cucumber, or mint

If you enjoy sweet drinks, consider limiting portion sizes or choosing versions with less added sugar.

5. Ignoring Signs of Heat Exhaustion

Ice water can help cool you down and support hydration, but it is not a treatment for heat-related illness on its own.

If you continue to feel unwell despite resting and drinking fluids, it may be a sign of something more serious.

Symptoms of heat exhaustion may include:

• Heavy sweating

• Weakness

• Dizziness

• Headache

• Nausea

• Muscle cramps

• Cool, clammy skin

• Rapid pulse

Move to a cooler place, loosen tight clothing, sip cool fluids if you are able, and rest.

If symptoms worsen or do not improve, seek medical attention.

6. Assuming Ice Water Is Harmful for Digestion

A common myth suggests that drinking cold water "shocks" the stomach or stops digestion.

Current scientific evidence does not support the idea that ice water damages the digestive system in healthy people.

However, some individuals with certain digestive conditions, such as sensitive stomachs, irritable bowel syndrome (IBS), or esophageal disorders, may find that very cold beverages temporarily worsen symptoms.

If you notice discomfort after drinking ice water, you might feel better with cool or room-temperature water instead.

The best choice is often the one that helps you stay comfortably hydrated.

Does Ice Water Really Cool Your Body?

Drinking cold water can provide a refreshing sensation and may help lower your body temperature slightly, particularly during or after exercise.

However, your body has sophisticated systems for regulating temperature, including:

• Sweating

• Increased blood flow to the skin

• Evaporation of sweat

Simply drinking ice water is not enough to prevent overheating if you're exposed to extreme heat for long periods.

Other cooling strategies include:

• Seeking shade

• Wearing lightweight clothing

• Using fans or air conditioning

• Taking cool showers

• Limiting strenuous activity during the hottest part of the day

Signs You May Not Be Drinking Enough Water

Even mild dehydration can affect how you feel.

Common signs include:

• Thirst

• Dry mouth

• Dark yellow urine

• Fatigue

• Headache

• Dizziness

• Reduced concentration

• Dry skin

Severe dehydration requires prompt medical attention and may involve:

• Confusion

• Very little urination

• Rapid heartbeat

• Fainting

• Extreme weakness

Who Should Be Especially Careful During Hot Weather?

Certain groups are at greater risk of dehydration and heat-related illness.

These include:

• Older adults

• Infants and young children

• Pregnant individuals

• People with heart disease

• People with kidney disease

• Individuals taking diuretics or certain blood pressure medications

• Outdoor workers

• Athletes

These individuals may need personalized advice from a healthcare professional regarding fluid intake.

Healthy Hydration Tips for Summer

Staying hydrated is about more than simply drinking water when you're thirsty.

Try these practical strategies:

Drink Before You Feel Thirsty

Take regular sips throughout the day, especially when temperatures are high.

Eat Water-Rich Foods

Many fruits and vegetables contain large amounts of water, including:

• Watermelon

• Cucumber

• Oranges

• Strawberries

• Lettuce

• Celery

These foods contribute to your daily fluid intake.

Limit Excess Alcohol

Alcohol can contribute to dehydration, particularly in hot weather.

If you choose to drink alcohol, alternate with water and avoid excessive intake.

Dress for the Weather

Wear:

• Loose-fitting clothing

• Light-colored fabrics

• Breathable materials

This helps your body cool itself more effectively.

Take Breaks From the Heat

If you're outdoors, spend time in shaded or air-conditioned areas whenever possible.

Common Myths About Drinking Ice Water

Myth 1: Ice Water Causes Colds

Colds are caused by viruses, not by drinking cold beverages.

Myth 2: Ice Water Stops Digestion

There is no strong scientific evidence that cold water prevents normal digestion in healthy individuals.

Myth 3: Cold Water Is Always Better

The best water temperature is the one that encourages you to drink enough fluids comfortably.

Some people prefer cold water, while others find room-temperature water easier to drink.

Myth 4: More Water Is Always Better

Although staying hydrated is important, drinking excessive amounts of water in a short period can, in rare cases, lead to a dangerous condition called hyponatremia, where sodium levels in the blood become too low.

This is uncommon but can occur during endurance events or when people drink large quantities of water without replacing electrolytes.

When Should You Seek Medical Care?

Contact a healthcare professional if you experience:

• Persistent vomiting after drinking fluids

• Signs of severe dehydration

• Repeated fainting

• Confusion

• Severe abdominal pain

• Symptoms of heat exhaustion that do not improve with rest and hydration

Seek emergency medical attention immediately if someone develops signs of heat stroke, including:

• A body temperature of 104°F (40°C) or higher

• Confusion or unusual behavior

• Loss of consciousness

• Seizures

• Hot, dry skin or heavy sweating accompanied by neurological symptoms

Heat stroke is a medical emergency and requires immediate treatment.

Final Thoughts

A glass of ice water can be one of the most refreshing ways to cool down on a hot day, and for most healthy people, it is perfectly safe to enjoy. The key is not avoiding cold water but using it wisely.

Drinking too quickly after intense heat, relying solely on water after heavy sweating, waiting until you're already dehydrated, choosing sugary beverages instead of plain water, overlooking signs of heat-related illness, or believing common myths about digestion are all habits that can interfere with staying comfortable and well hydrated.

Rather than focusing only on the temperature of your drink, prioritize consistent hydration throughout the day, eat water-rich foods, replace electrolytes when appropriate, and pay attention to your body's signals. If you develop persistent symptoms of dehydration or heat-related illness, seek medical care promptly.

By making a few simple adjustments to your hydration habits, you can stay safer, feel more energized, and enjoy the summer heat with greater comfort.