How many died at Hiroshima bombing?

The atomic bombing of Hiroshima on August 6, 1945, resulted in an estimated 140,000 deaths by the end of that year, primarily due to the immediate effects of the blast, heat, and radiation exposure. Many victims died in the subsequent months and years from radiation-related illnesses. The total number of deaths has been the subject of ongoing research and debate, but the immediate impact was catastrophic.