This 25-year-old marketing executive mostly spends his day criss-crossing the city on his motorcycle, moving from one client meeting to another, braving the furnace-like midday heat. Like many young professionals, he believed he was doing the right thing by drinking water constantly. He stopped frequently to refill his bottle, consuming nearly five litres through the day. What he did not do was eat. A rushed morning meant he skipped breakfast and his lunch break was lost in back-to-back meetings. He consumed no fruit, no electrolyte drink, no oral rehydration solution — only plain water. That proved costly. By evening, he began to feel strangely light-headed. Nausea followed. He dismissed it as exhaustion. He pushed on, determined to finish his final appointments. Within hours, his speech became sluggish. He grew unusually drowsy and disoriented. Alarmed colleagues rushed him to our emergency department.…