Regardless, the weather cannot be taken lightly. “This kind of prolonged surge of heat is unprecedented in Kerala,” says Dr S.I. Hafees, deputy superintendent, Government General Hospital, Thiruvananthapuram. “We see around 20-25 cases of heatstroke in the hospital. Because of the rise in atmospheric temperature, body heat also goes up. Once it crosses 40 degrees Celsius, metabolic functions are affected.” Throbbing headaches, nausea, diziness, lack of sweating and muscle cramps are some of the symptoms of sunstroke.