Morning headache in heat? Early sign of heatstroke, warn doctors

A morning headache during extreme heat may signal early heatstroke, doctors warn. Rising temperatures can lead to dehydration, electrolyte imbalance, and overheating, triggering headaches along with fatigue, dizziness, and nausea. Ignoring these signs can be dangerous. Staying hydrated, avoiding peak heat, and recognising early symptoms are key to preventing serious heat-related illnesses.