Is Hot Weather Bad For Your Heart? A Cardiologist Answers

The summer months can be really harsh on your health. Dehydration, sunburn, and heatstroke are common issues associated with heat, but this is just the tip of the iceberg. Regular exposure to extreme heat can also affect your cardiovascular health.

Can Hot Weather Cause Heart Problems?

“Yes, hot weather can place significant stress on the cardiovascular system, especially for individuals with pre-existing heart issues,” answers Dr Deebanshu Gupta, Cardiologist at Sarvodya Hospital, Jalandhar.

During high temperatures, our body works harder to maintain a stable internal temperature by increasing blood flow to the skin and triggering sweating. This process forces the heart to pump faster and more vigorously than usual.

Who Is At Risk?

While the risk is somewhat manageable for healthy people, for those with excessive hypertension, coronary artery disease, heart failure, arrhythmias, or previous cardiac events, heat can become a serious concern.

Also Read: Can High Blood Pressure Be Permanently Cured?

Dehydration is one of the major concerns during such weather. Along with poor hydration, we also sweat a lot during the day, which leads to fluid loss and dehydration.
How does dehydration affect heart function?

• A 2023 study published in the Yale Journal of Biology and Medicine, prolonged dehydration reduces blood volume, making the heart work harder to circulate blood efficiently.
• It can also lead to electrolyte imbalances, potentially triggering palpitations or dangerous arrhythmias in susceptible individuals.
• Additionally, certain heart medications such as diuretics, beta-blockers, and some blood pressure medications may affect the body’s ability to regulate temperature or retain adequate hydration, further increasing risk during heatwaves.

NOTE: It is important to avoid unnecessary heat exposure, especially during extreme heat waves. If you are a heart patient, consult your doctor for any extra measures to be taken to prevent any complications.

Also Read: Dehydration Risk Increases as Temperatures Rise: Expert Shares What To Do

Symptoms that may indicate heat-related cardiac stress include:

• Excessive fatigue
• Dizziness or lightheadedness
• Rapid heartbeat or palpitations
• Chest discomfort
• Shortness of breath
• Swelling or sudden weakness

Prevention Tips

To protect heart health during hot weather, Dr Gupta advises patients to:

• Stay well hydrated unless fluid intake is medically restricted
• Avoid direct sun exposure during peak afternoon heat
• Limit strenuous outdoor activity in high temperatures
• Wear light, breathable clothing
• Monitor blood pressure regularly if hypertensive
• Never ignore symptoms such as chest pain or breathlessness

Final Word

Cardiac complications that are caused by such weather are often underestimated, but they can escalate quickly, particularly in elderly individuals and those with chronic cardiovascular disease. Ultimately, while hot weather alone does not cause heart disease, it can significantly worsen existing cardiac conditions and trigger complications if precautions are not taken.