Stepping out during an Indian summer, the impact is almost immediate. The heat isn’t just uncomfortable-it feels intense and draining. It can slow you down, affect your focus, and at times, lead to more serious health concerns.
While dehydration, sunburn, and fatigue are commonly discussed, the effects on the brain are often overlooked. Extreme heat can disrupt normal brain function, leading to symptoms such as headaches, dizziness, confusion, and difficulty concentrating.
“During summer, extreme heat and humidity can cause dehydration and sodium loss, which may trigger seizures. Excessive sweating can lower sodium levels in the body, increasing the risk. In some cases, heatstroke can occur, leading to loss of consciousness and seizures. People prone to seizures should stay well-hydrated and wear lightweight, light-coloured clothing,” said Dr. Shubha Subramanian, Senior Consultant – Neurology at Kauvery Hospital, Vadapalani, Chennai, speaking to TOI Health.
Who Is Most Affected?
Not everyone is affected equally. Children, the elderly, and individuals with pre-existing neurological conditions are more vulnerable. Those who spend long hours outdoors—such as delivery workers, traffic police, and street vendors—face constant exposure, making it more than just occasional discomfort; it’s a daily risk.
Even indoors, conditions aren’t always safe. Poor ventilation, power outages, and lack of cooling can worsen the impact. The brain depends on a stable internal environment, and extreme heat can easily disrupt that balance.
Common Summer Health Problems We Don’t Talk About Enough
“Certain childhood epilepsy syndromes, such as Dravet syndrome, can lead to increased seizure activity when exposed to extreme heat. Given how intense Indian summers can be, it is important to take precautions, avoid stepping out during peak daytime hours, and stay safe. Prolonged heat exposure can impact overall neurological health and may result in cognitive issues, including memory problems and brain fog,” said Dr. Shubha Subramanian.
She further explained, “In conditions like multiple sclerosis, extreme heat can worsen symptoms. Dehydration during summer also raises the risk of stroke. Patients with Parkinson’s disease and Alzheimer’s may face added challenges due to impaired thermoregulation. Hot weather can also lead to fatigue, and exposure to bright sunlight is a well-known trigger for headaches in people with migraines.”
Small Warning Signs We Overlook
The challenge lies in how easily early symptoms are dismissed. A slight headache, unusual irritability, or minor forgetfulness is often brushed off as the result of a long day or the heat.
But that’s precisely the concern—the heat may already be affecting how the brain functions.
Staying hydrated and taking breaks from the sun certainly help, but awareness is equally important. Recognising that heat impacts not just the body but also the brain can change how seriously we respond to these signs.
Perhaps that’s what Indian summers now demand—not just endurance, but greater attention and care.