WHITE PLAINS, N.Y., Aug. 4, 2025 — With summer temperatures soaring across the U.S., the American Heart Association is urging residents to take precautions against extreme heat, especially those with existing heart conditions.

According to the U.S. Centers for Disease Control and Prevention, more than 1,200 people die in the U.S. each year as a direct cause of extreme heat. That number is rising substantially – as heat and dehydration force the heart to work harder, placing it under significant stress. A study published in Circulation, the American Heart Association’s peer-reviewed journal, predicts that cardiovascular deaths linked to extreme heat could more than double over the next two decades.

Here are some tips to stay safe in high temperatures:

  • Avoid peak sun hours: Stay indoors between 12-3 p.m., when the sun is strongest.
  • Dress appropriately: Wear lightweight, light-colored clothing made of breathable fabrics like cotton. Wear a hat and sunglasses. Apply water-resistant sunscreen with SPF 15 or higher and reapply every two hours.
  • Stay hydrated: Drink water before, during and after outdoor activity. Avoid alcohol and caffeine.
  • Take breaks: Rest in shaded or cool areas, hydrate and resume activity gradually.

Know the signs of heat-related illness. If you believe you have heat exhaustion, move to a cooler area, stop all activities and drink water to rehydrate. If you believe you have heat stroke, call 911 immediately.

Symptoms of heat exhaustion:

  • Headaches
  • Cool, pale, moist skin
  • Fast, weak pulse
  • Dizziness and light-headedness
  • Weakness or muscle cramps
  • Nausea and vomiting

Symptoms of heat stroke

  • High body temperature of 103 degrees Fahrenheit or higher
  • Hot, red, dry or damp skin
  • Fast, strong pulse
  • Headache, dizziness and confusion
  • Nausea
  • Fainting

“Extreme heat is more than uncomfortable. It can be life-threatening, especially for people with heart disease or high blood pressure,” said Kristen Alouisa, executive director of the American Heart Association for Westchester and Fairfield Counties. “We want our communities to stay safe and informed so they can enjoy summer while protecting their health.”

Dr. Joshua Latzman, cardiologist at White Plains Hospital, added, “We see an increase in heat-related complications every summer, particularly among older adults and those with cardiovascular conditions. Prevention is key. Staying hydrated, avoiding peak heat and recognizing symptoms early can save lives.”

Despite the heat, staying active is still important. Try walking, swimming, biking, skating, jumping rope or organizing a neighborhood soccer game. Gardening, pushing a stroller or walking the dog also count. Schedule activities for early morning or evening, or find indoor spaces like malls, gyms or community centers.

To learn more about how heat affects heart health, visit heart.org.

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About the American Heart Association

The American Heart Association is a relentless force for a world of longer, healthier lives. Dedicated to ensuring equitable health in all communities, the organization has been a leading source of health information for more than one hundred years. Supported by more than 35 million volunteers globally, we fund groundbreaking research, advocate for the public’s health, and provide critical resources to save and improve lives affected by cardiovascular disease and stroke. By driving breakthroughs and implementing proven solutions in science, policy, and care, we work tirelessly to advance health and transform lives every day. Connect with us on heart.org, Facebook, Instagram, X or by calling 1-800-AHA-USA1.

For Media Inquiries:

Bong Arquiza: Bong.Arquiza@heart.org

For Public Inquiries: 1-800-AHA-USA1 (242-8721)

heart.org and stroke.org