Hot air balloon sea level, and humidity of the air surrounding. On a warm day, a balloon cannot lift as much as on a cool day, because the temperature required for launch will exceed the maximum sustainable for nylon envelope fabric. Also, in the lower atmosphere, the lift provided by a hot air balloon decreases about 3% for each 1,000 meters (1% per 1,000 ft) of altitude gained. Standard hot air balloons are known as Montgolfier balloons and rely solely on the buoyancy of hot air provided by the burner and contained by the envelope. This style of balloon was developed by the
2013 Luxor hot air balloon crash body. Doctors at the Luxor International Hospital said that many of the dead suffered severe internal injuries and severe burns. After news of the tragedy broke, Governor of Luxor Ezzat Saad banned hot air balloon flights in his jurisdiction until further notice. Egypt's civil aviation minister, Wael el-Maadawi, followed by suspending balloon flights nationwide. In a statement, President Mohamed Morsi expressed his "deepest condolences and sympathy for the families of those who lost their lives in this tragic incident." National government spokesman Alaa Hadidi said a committee would be formed to investigate the accident. The bodies of the victims were