SUHAG - Temperature close to 43 degrees Celsius had killed a school teacher in the Upper governorate of Suhag while supervising a final Thanaweya Amma examination. This brings the total number of people killed by the heat wave, which gripped the nation during the past three days, to four, the local media reported Thursday. Doctors at Abu Qurqas General Hospital said they had admitted Nader Fawzi Ghattas, who was suffering from heat-stroke. The doctors have confirmed Ghattas' death immediately after his arrival.