With the India Meteorological Department (IMD) issuing a health advisory for an impending heatwave, concerns about summer migraines are rising. Dr. Rupali Mehrotra, a principal consultant in internal medicine at Regency Health in Kanpur, highlights that migraines are neurological disorders, not just severe headaches. The primary cause of summer migraines is the body's thermoregulation process, where rising temperatures lead to blood vessel dilation, triggering pain in susceptible individuals. Dehydration plays a significant role, as even a 2% drop in body water can cause brain tissue shrinkage, leading to migraines. Additionally, harsh sunlight and poor sleep during hot nights contribute to the problem. Differentiating between a migraine and a dehydration headache is crucial for effective treatment. Dr. Mehrotra recommends preventive measures such as drinking 2.5 to 3 liters of water daily, limiting outdoor activities during peak sun hours, and maintaining a consistent sleep schedule. Patients experiencing severe headaches with symptoms like fever or confusion should seek immediate medical attention. This article serves as informational guidance and is not a substitute for professional medical advice.