Both the Hiroshima and the Nagasaki atomic bombs exhibited similar
effects.
The damages to man-made structures and other inanimate objects was the
result in both cities of the following effects of the explosions:
A. Blast, or pressure wave, similar to that of normal explosions.
B. Primary fires, i.e., those fires started instantaneously by the
heat radiated from the atomic explosion.
C. Secondary fires, i.e., those fires resulting from the collapse of
buildings, damage to electrical systems, overturning of stoves, and
other primary effects of the blast.