If you want to look at the death toll from the bombing of Hiroshima you find more people died from the firestorms than from the radiation or blast effect.

Hiroshima (August 6, 1945)
http://www.cfo.doe.gov/me70/manhattan/hiroshima.htm


Nagasaki (August 9, 1945)
http://www.cfo.doe.gov/me70/manhattan/nagasaki.htm
_________________________
May set off to explore without any sense of direction or how to return.