August is often the hottest and most humid stretch of the year. Even as hints of fall begin to appear, late summer can place extra strain on the body, especially for anyone living with heart disease or high blood pressure. While sunny days and outdoor activities remain part of the season’s appeal, it is important to recognize how extreme heat affects the heart.

As temperatures rise, your heart works harder to keep the body cool. For every degree your body temperature increases, your heart may beat about ten additional times per minute. Healthy hearts can usually manage the extra effort, but for people with cardiovascular conditions or prolonged heat,  humidity can become dangerous. Dehydration adds to the strain by thickening the blood and forcing the heart to work even harder. According to the American Heart Association, heat-related cardiovascular risks are expected to increase as summers grow hotter and longer.

The good news is that a few simple precautions can make a major difference. Try to limit outdoor activity during the hottest part of the day, usually between 10 a.m. and 4 p.m. Drink water consistently throughout the day, even before you feel thirsty. Wear lightweight, breathable clothing, and take breaks in shaded or air-conditioned spaces whenever possible. If you take heart or blood pressure medications, speak with your doctor about whether heat may affect how they work.

Late summer is still a season to enjoy, but August is also a reminder to slow down when needed and pay attention to your body. Listening to the signs of heat exhaustion early can help protect your heart and allow you to safely enjoy the final weeks of summer.