Stay up to date with notifications from The IndependentNotifications can be managed in browser preferences.AllNewsSportCultureLifestyleExtreme heat is a leading cause of death in the U.S. and significantly worsens existing chronic health conditions, according to medical experts. Heat forces the heart to work harder, posing risks for individuals with heart disease, the country's leading cause of death. Dehydration caused by high temperatures can impair kidney function, leading to kidney disease progression and an increased risk of kidney stones. Arthritis, including gout, can be exacerbated by heat and dehydration, which raise uric acid levels and increase inflammation. Migraines are often triggered or worsened by heat waves due to changes in pressure and temperature, as well as dehydration. In fullIt’s getting hotter across the US and it could make fourth health conditions worse, experts warnThank you for registeringPlease refresh the page or navigate to another page on the site to be automatically logged inPlease refresh your browser to be logged in