Heatwaves are increasingly recognized as a major public health threat due to their potential to overwhelm the body's natural cooling mechanisms. Under normal conditions, the body regulates temperature through sweating and increased blood flow to the skin. However, during extreme heat, particularly in humid environments, this system can fail, leading to a rapid rise in body temperature. This situation can escalate to heatstroke, a medical emergency characterized by a body temperature exceeding 40°C, which can severely affect vital organs such as the kidneys and brain. Symptoms of heat-related illnesses include dizziness, heavy sweating, and confusion. Vulnerable groups, including children, the elderly, and outdoor workers, face heightened risks during these events. To mitigate these dangers, experts recommend drinking plenty of water, avoiding direct sunlight during peak hours, and wearing light clothing. With climate change contributing to more frequent and intense heatwaves globally, understanding the health impacts of extreme heat is becoming increasingly essential.