As temperatures in Dubai climb past 40°C, it’s not just your comfort at risk — your heart health can suffer too. Most people associate hot weather with dehydration or sunburn, but the effects on the cardiovascular system are often overlooked.
For those with heart conditions, high blood pressure, or anyone active outdoors, it’s important to understand how extreme heat stresses the heart. In this article, we’ll explain why heat affects your heart, who’s most at risk, and how to stay safe during the UAE’s hottest months.
Why Does Heat Affect the Heart?
When exposed to high temperatures, your body works harder to stay cool. It:
- Widens blood vessels (vasodilation) to release heat
- Increases heart rate to pump more blood to the skin
- Triggers sweating to regulate body temperature
These natural reactions place extra strain on your heart, especially in people with underlying heart problems like hypertension, arrhythmias, or heart disease.
In extreme heat, your body also loses fluids and vital electrolytes such as sodium and potassium. This can lower blood volume and pressure, making your heart work harder to circulate blood efficiently — increasing the risk of complications.
Who’s Most at Risk?
While anyone can be affected by heat-related heart stress, certain groups are more vulnerable:
- People with high blood pressure
- Patients with heart failure or coronary artery disease
- Older adults, whose bodies don’t regulate temperature as well
- Diabetics
- Those taking medications like diuretics, beta-blockers, or antihypertensives
- Outdoor workers and athletes
Even healthy people should stay cautious during heatwaves, especially when humidity is high, which reduces the body’s ability to cool itself through sweat.
How Can Heat Impact the Heart?
The effects of heat on your heart can range from mild to severe. Common issues include:
- Increased heart rate (tachycardia)
- Low blood pressure due to fluid loss
- Dizziness or fainting from dehydration
- Arrhythmias triggered by electrolyte imbalances
- Worsening of existing heart conditions
- In severe cases, heatstroke, which can lead to multi-organ failure and cardiac complications
If you have a history of heart problems, your heart is less equipped to handle this added workload.
Symptoms You Shouldn’t Ignore
Certain signs during hot weather should never be dismissed. Act quickly if you experience:
- Rapid or irregular heartbeat
- Extreme fatigue or weakness
- Dizziness or lightheadedness
- Shortness of breath
- Nausea or vomiting
- Cold, clammy skin
- Chest pain or tightness
These could signal heat exhaustion, dehydration, or a serious heart problem and should be checked by a doctor immediately.
How to Protect Your Heart in Dubai’s Summer
You can dramatically reduce your risk by taking a few simple precautions:
- Stay Well-Hydrated:
Drink plenty of water throughout the day. If sweating heavily, replace lost electrolytes with appropriate fluids — avoid sugary or energy drinks. - Avoid Outdoor Activity During Peak Heat:
Limit outdoor walks, exercise, or labor-intensive tasks to early mornings or evenings. - Dress for the Heat:
Wear loose, breathable, light-colored clothing to help your body stay cool. - Review Your Medications:
Some heart medications affect how your body reacts to heat. Discuss with your cardiologist whether you need to take extra care during the hotter months. - Take Frequent Breaks in Cool, Shaded Areas:
Rest regularly to allow your body to recover from heat exposure. - Listen to Your Body:
Don’t ignore symptoms like dizziness, rapid heartbeat, or chest discomfort. Acting early can prevent serious complications.
Final Thoughts
Dubai’s intense summer heat can seriously impact your heart health. Understanding how your body responds to heat and knowing when to be cautious is crucial — especially if you have existing heart conditions or other risk factors.
If you notice unusual symptoms during hot weather, or if you have a history of heart disease, it’s wise to consult a cardiologist.
Dr. Fady Turquieh provides tailored heart care for all seasons, with extra precautions for the summer months.
Book your heart check-up today at www.dubaicardiology.com and stay heart-safe this summer.