<P> Although the bomb was more powerful than the one used on Hiroshima, the effect was confined by hillsides to the narrow Urakami Valley . Of 7,500 Japanese employees who worked inside the Mitsubishi Munitions plant, including "mobilized" students and regular workers, 6,200 were killed . Some 17,000--22,000 others who worked in other war plants and factories in the city died as well . Casualty estimates for immediate deaths vary widely, ranging from 22,000 to 75,000 . At least 35,000--40,000 people were killed and 60,000 others injured . In the days and months following the explosion, more people died from their injuries . Because of the presence of undocumented foreign workers, and a number of military personnel in transit, there are great discrepancies in the estimates of total deaths by the end of 1945; a range of 39,000 to 80,000 can be found in various studies . </P> <P> Unlike Hiroshima's military death toll, only 150 Japanese soldiers were killed instantly, including thirty - six from the 134th AAA Regiment of the 4th AAA Division . At least eight known POWs died from the bombing and as many as 13 may have died, including a British prisoner of war, Royal Air Force Corporal Ronald Shaw, and seven Dutch POWs . One American POW, Joe Kieyoomia, was in Nagasaki at the time of the bombing but survived, reportedly having been shielded from the effects of the bomb by the concrete walls of his cell . There were 24 Australian POWs in Nagasaki, all of whom survived . </P> <P> The radius of total destruction was about 1 mi (1.6 km), followed by fires across the northern portion of the city to 2 mi (3.2 km) south of the bomb . About 58% of the Mitsubishi Arms Plant was damaged, and about 78% of the Mitsubishi Steel Works . The Mitsubishi Electric Works suffered only 10% structural damage as it was on the border of the main destruction zone . The Nagasaki Arsenal was destroyed in the blast . Although many fires likewise burnt following the bombing, in contrast to Hiroshima where sufficient fuel density was available, no firestorm developed in Nagasaki as the damaged areas did not furnish enough fuel to generate the phenomenon . Instead, the ambient wind at the time pushed the fire spread along the valley . </P> <P> As in Hiroshima, the bombing badly dislocated the city's medical facilities . A makeshift hospital was established at the Shinkozen Primary School, which served as the main medical centre . The trains were still running, and evacuated many victims to hospitals in nearby towns . A medical team from a naval hospital reached the city in the evening, and fire - fighting brigades from the neighboring towns assisted in fighting the fires . Takashi Nagai was a doctor working in the radiology department of Nagasaki Medical College Hospital . He received a serious injury that severed his right temporal artery, but joined the rest of the surviving medical staff in treating bombing victims . </P>

When was the second bomb dropped on nagasaki