When temperatures rise, so do the risks.

A heat wave is more than just an uncomfortable stretch of hot weather. It places extra stress on your body by increasing sweat, fluid loss, and electrolyte depletion. If you're not prepared, that can affect everything from your energy levels to your ability to regulate body temperature.

Whether you're working outdoors, exercising, traveling, or simply trying to get through another hot day, here's what you need to know to stay safe.

What Is a Heat Wave?

A heat wave is a period of unusually hot weather that lasts several days or longer. Depending on where you live, temperatures can reach dangerous levels—especially when combined with high humidity.

Your body constantly works to maintain an internal temperature around 37°C (98.6°F).

When the surrounding temperature climbs, your body relies on sweating to cool itself down.

The problem?

Sweating doesn't only remove water.

It also removes essential electrolytes like:

• Sodium
• Chloride
• Potassium
• Magnesium
• Calcium

Without replacing both fluids and electrolytes, cooling becomes less efficient, making heat-related illness more likely.

Why Heat Waves Can Be Dangerous

Extreme heat affects nearly every system in your body.

As dehydration develops, your blood volume decreases, forcing your heart to work harder to circulate blood and cool you down.

This extra strain can lead to:

• Reduced physical performance
• Fatigue
• Muscle cramps
• Headaches
• Dizziness
• Increased heart rate
• Difficulty concentrating

For older adults, children, pregnant women, and people with chronic medical conditions, the risks are even greater.

Heat-Related Illnesses You Should Know

1. Dehydration

The most common heat-related problem.

Signs include:

• Dry mouth
• Increased thirst
• Dark urine
• Fatigue
• Headache
• Reduced sweating later on

Ignoring dehydration can quickly lead to more serious heat illnesses.

2. Heat Cramps

Heavy sweating causes your body to lose fluids and electrolytes, particularly sodium.

This may result in painful muscle cramps, especially in the:

• Legs
• Arms
• Abdomen

Although not usually life-threatening, cramps are often an early warning sign that your body needs fluids and electrolytes.

3. Heat Exhaustion

Heat exhaustion develops when your body struggles to keep itself cool.

Symptoms include:

• Heavy sweating
• Weakness
• Dizziness
• Nausea
• Rapid pulse
• Cool, clammy skin

Without treatment, heat exhaustion can progress into heat stroke.

4. Heat Stroke (Medical Emergency)

Heat stroke occurs when your body can no longer regulate its temperature.

Warning signs:

• Body temperature above 40°C (104°F)
• Confusion
• Slurred speech
• Fainting
• Hot, dry skin (or sometimes profuse sweating)
• Seizures

Heat stroke requires immediate emergency medical care.

Call emergency services immediately if you suspect someone is experiencing heat stroke.

5. Worsening Existing Health Conditions

Heat doesn't only affect healthy people.

It can make existing conditions worse, including:

• Heart disease
• Kidney disease
• Diabetes
• Respiratory conditions

High temperatures place additional strain on the cardiovascular system while dehydration reduces blood flow to important organs.

Recent Heat Waves Show Why Preparation Matters

Across Europe, recent heat waves pushed temperatures above 40°C (104°F) and were associated with an estimated 1,300 heat-related deaths in affected areas.

Extreme heat is becoming more frequent around the world, making preparation more important than ever.

The good news? A few simple habits can go a long way in helping you stay cool, hydrated, and reduce your risk of heat-related illness.

How to Stay Safe During a Heat Wave

1. Stay Ahead of Dehydration 💧

Don't wait until you feel thirsty.

Thirst is often one of the last signs your body gives that it's already running low on fluids.

During a heat wave:

• Drink water regularly throughout the day.
• If you're sweating heavily, replace electrolytes as well as fluids.
• Limit alcohol, which can increase fluid loss.
• If you drink coffee or other caffeinated beverages, balance them with plenty of water.

Pro Tip: Check your urine color. Pale yellow usually means you're well hydrated.

2. Avoid the Hottest Hours ☀️

The sun is usually strongest between 10 a.m. and 4 p.m.

If possible:

• Schedule walks, exercise, or yard work early in the morning or later in the evening.
• Take frequent breaks in the shade.
• Slow your pace if you must be active outdoors.

Even small adjustments to your schedule can reduce heat stress.

3. Keep Your Home as Cool as Possible ❄️

Your home should help your body cool down—not trap heat.

During the hottest part of the day:

• Close blinds or curtains to block direct sunlight.
• Keep windows closed if it's hotter outside than inside.
• Open windows in the evening or early morning once temperatures begin to drop.

Fans can improve comfort, but during extreme heat (around 35°C / 95°F or higher), they may not be enough to prevent heat illness on their own.

4. Dress for the Weather 👕

What you wear can make a surprising difference.

Choose:

• Loose-fitting clothing
• Lightweight fabrics
• Light-colored clothing that reflects sunlight
• A wide-brimmed hat if you'll be outside

These simple choices help your body release heat more efficiently.

5. Cool Your Body Down 🧊

If you're starting to feel overheated:

• Take a cool shower or bath.
• Place a cool, damp towel on your neck, wrists, or forehead.
• Mist your skin with water if you don't have air conditioning.

Cooling your skin helps your body regulate its temperature more effectively.

6. Spend Time Somewhere Air-Conditioned 🏢

If your home isn't air-conditioned, try spending a few hours in a cooler public place, such as:

• Libraries
• Shopping malls
• Community cooling centers
• Cafés

Even a short break in an air-conditioned environment can reduce the strain that prolonged heat places on your body.

7. Pay Attention to Heat Alerts 📱

Before spending time outdoors, check your local weather forecast.

On days with excessive heat warnings:

• Limit outdoor activities.
• Postpone strenuous exercise if possible.
• Stay indoors during the hottest part of the day.

Planning ahead is one of the easiest ways to stay safe.

8. Know When It's Time to Get Help ⚠️

Heat illness can develop quickly.

Watch for symptoms such as:

• Heavy sweating
• Muscle cramps
• Dizziness
• Headache
• Nausea
• Weakness
• Rapid heartbeat

Call emergency services immediately if someone develops:

• Confusion
• Fainting
• Seizures
• Loss of consciousness
• A very high body temperature (40°C / 104°F or higher)

These may be signs of heat stroke, a life-threatening medical emergency.

9. Check on Those Most at Risk ❤️

Some people are more vulnerable to extreme heat than others.

Take time to check on:

• Older adults
• Infants and young children
• Pregnant women
• People with heart, kidney, or lung conditions
• Outdoor workers

A quick phone call or visit can make a real difference during a heat wave.

Core Insights

Heat waves are more than just uncomfortable—they place extra stress on your body and increase your need for fluids and electrolytes.

Fortunately, staying safe doesn't have to be complicated. Drinking regularly, planning around the hottest hours, dressing appropriately, and recognizing early warning signs can all help reduce your risk of heat-related illness.

Stay cool, stay prepared, and make hydration part of your daily routine.

Stay Ready for Hot Days

When you're sweating more than usual, your body loses both fluids and essential electrolytes.

Salt of the Earth is formulated with Pink Himalayan salt and key electrolytes to help replenish what you lose through everyday activity, workouts, and hot weather.

Explore Salt of the Earth Electrolytes→