Over the next several days and weeks, several U.S. states are facing warnings of extreme heat waves. And if you're unprepared for it, extreme heat can be deadly. According to the Centers for Disease Control and Prevention, more than 600 people die each year in the U.S. due to extreme heat, often from heatstroke, which occurs when the body's temperature reaches 104°F or higher. And whether we like it or not, evidence shows the record high temperatures are here to stay. The National Oceanic and Atmospheric Administration reports that July 2021 was the hottest month ever recorded worldwide,