With unprecedentedly high temperatures, heat stress and heatstroke risks increase significantly among seniors, who face weakened natural body cooling mechanisms, higher chances of dehydration, and chronic illnesses. Global statistics show a rise in heat-related deaths among people over 65 in the last two decades. Aging reduces the body’s ability to adapt to heat due to impaired blood circulation, decreased sweat gland function, and rapid dehydration. Symptoms such as dizziness, unexplained fatigue, irregular heartbeat, and mental confusion may appear and require immediate medical attention. Experts recommend preventive measures including staying in air-conditioned places, drinking water regularly, wearing light cotton clothing, and reducing strenuous activity during peak heat hours.