Hiroshima after the bomb...

The bomb exploded and the surviving people are telling, that they saw nothing else than bright white and the next second they felt this wave of extreme heat. And when the shock wave cam shortly afterwards it broke down whole houses, crashing parked cars against the houses and outside the city it still destroyed windows. In a one mile radius around the center of the explosion nothing was standing any more. And after the explosion was over a huge part of the city was in fire.
At the beginning the Japanese government did not know for sure what happen. All the communication systems in Hiroshima stopped working at 8:16 a.m. And vague reports of some sort of large explosion had begun to filter in, but the Japanese high command knew that no large-scale air raid had taken place over the city and that there were no large stores of explosives there.  Eventually they send a Japanese officer to look at the city from a plane. When he was still 100km away from Hiroshima he reported about a huge cloud of smoke that hung over the city. Sixteen hours later the first exact confirmation about what happened came, when the United States announced that they dropped the bomb. The following day the Japanese government sent medical stuff and relief workers to Hiroshima to stabilize the situation and help the injured people. All the hospitals in the center of the city were totally destroyed, and soon the death rate actually began to climb again as patients who had appeared to be recovering began suffering from this strange new illness.
On August 9th the American forces were showering leaflets all over Japan, to inform the people about what happened to Hiroshima, and that they should surrender or more cities would be destroyed. But they didn't even wait for an answer, the troops were just waiting for the weather to clear up to drop another bomb over Nagasaki...