5 min read Updated: Apr 29, 2026 03:02 PM IST When summer reaches its peak in Mumbai, the number of “secondary” headaches in patients, who normally do not suffer from migraines due to heat exhaustion or dehydration, goes up significantly. (Source: Express Archives) Written by Dr Divya Gopal These days, my clinic is full of patients with heat-induced migraines, a neurological condition causing severe, throbbing headaches, accompanied by nausea, dizziness and sensitivity to light. One of them told me that she used public transport on a daily basis. She didn’t spend all day out in the sun but instead moved swiftly from her air-conditioned office to the train station. But after a month of recurring headaches, she noticed a change. “I got them every day and they became more severe in the afternoons,” she said. Her schedule had three unexpected triggers for headaches. She left her air-conditioned office and headed to the railway station during the afternoon when it is the hottest outside.…