South Florida’s tropical climate offers sunshine year-round — but heat and humidity affect the cardiovascular system in ways that many people overlook.

High ambient temperatures can cause increased heart rate, dehydration, and electrolyte imbalance, all of which place extra stress on the heart.⁷

How Heat Affects the Heart

1. Greater Blood Flow to Skin

Your heart works harder to cool your body.

2. Increased Heart Rate

Heat causes higher resting heart rate in susceptible individuals.⁸

3. Risk of Dehydration

Dehydration thickens blood and makes the heart work harder.⁹

4. Electrolyte Imbalance

Loss of sodium and potassium can trigger arrhythmias.¹⁰

Who Should Be Cautious

• Seniors & elderly

• People with heart failure

• Patients on diuretics or hypertension meds

• Those with diabetes

• Outdoor workers or athletes

Protect Your Heart in the Heat

✔ Stay hydrated with water & electrolytes
✔ Avoid peak sun hours (10am–4pm)
✔ Wear light, breathable clothing
✔ Cool down in air-conditioned places
✔ Avoid intense exercise in midday heat

Being heat-aware can protect your heart, especially in South Florida’s hot months. If you experience dizziness, chest tightness, or rapid heartbeat during heat exposure, seek medical evaluation immediately.

📞 Book a consult at Heart and Vascular Centers of South Florida for personalized cardiac guidance.

Sources:
7. Heat & Cardiovascular Risk – nejm.org
8. Heart Rate & Heat Exposure – jamanetwork.com
9. Dehydration & Cardiac Function – ncbi.nlm.nih.gov
10. Electrolytes & Arrhythmia Risk – heart.org