Blasted and/or burned 14,146 28.3
Partially burned or blasted 5,441 10.9
Total buildings and houses destroyed 19,587 39.2
Undamaged 30,413 60.8

In Hiroshima, all utilities and transportation services were disrupted for
varying lengths of time. In general however services were restored about
as rapidly as they could be used by the depleted population. Through
railroad service was in order in Hiroshima on 8 August, and electric power
was available in most of the surviving parts on 7 August, the day after the
bombing. The reservoir of the city was not damaged, being nearly 2 miles
from X. However, 70,000 breaks in water pipes in buildings and dwellings
were caused by the blast and fire effects. Rolling transportation suffered
extensive damage. The damage to railroad tracks, and roads was
comparatively small, however. The electric power transmission and
distribution systems were badly wrecked. The telephone system was
approximately 80% damaged, and no service was restored until 15 August.

Despite the customary Japanese lack of attention to sanitation measures, no
major epidemic broke out in the bombed cities. Although the conditions
following the bombings makes this fact seem surprising, the experience of
other bombed cities in both Germany and Japan show Hiroshima and Nagasaki
not to be isolated cases.

The atomic explosion over Nagasaki affected an over-all area of
approximately 42.9 square miles of which about 8.5 square miles were water
and only about 9.8 square miles were built up, the remainder being
partially settled. Approximately 36% of the built up areas were seriously
damaged. The area most severely damaged had an average radius of about 1
mile, and covered about 2.9 square miles of which 2.4 were built up.