 The first B-29s to arrive dropped bombs in a large X pattern centered in Tokyo's densely populated working class district near the docks in both Koto and Chūō city wards on the water; later aircraft simply aimed near this flaming X.The individual fires caused by the bombs joined to create a general conflagration, which would have been classified as a firestorm but for prevailing winds gusting at .Approximately of the city were destroyed and some 100,000 people are estimated to have died.