Hiroshima Atomic bomb completely destroyed and burned in Hiroshima city after one hours

About one hour after the explosion of the Hiroshima Atomic Bomb on August 6, 1945 at 8:15 AM, the majority of Hiroshima City burst into a lot of flames. On Hiroshima City just under the Hiroshima Atomic Bomb, Mushroom cloud had occurred. Huge smoke clouds was covered with extensive fires. Due to the violent blast of Hiroshima Atomic Bomb and the thermal radiation, most of the houses without buildings were completely destroyed and burned down. Many citizens were burned down and died by total destruction or burned without escape and breathing from the fires at the surroundings. Most Japanese houses were made of wood, with the exception of reinforced concrete buildings involving complete destruction and burnout.