Heat waves can be hazardous to the heart Posted in: Columns With many areas of east Texas reaching temperatures in the upper 90s today, the American Heart Association, a global force for longer, healthier lives for all, is urging people to take extra steps to protect their hearts. Precautions are especially important for older adults and individuals with high blood pressure,PLEASE LOG IN FOR PREMIUM CONTENT. Our website requires visitors to log in to view the best local news. Not yet a subscriber? Subscribe today!