Nuclear Explosion: Mushroom Cloud A nuclear blast releases massive amounts of energy which is dissipated as fireball, blast forces/waves, prompt radiation, light and heat (thermal energy), and delayed ionizing radiation dose (fallout). Fireball Vaporization of matter by tremendous heat within fireball Located at the epicenter of the explosion Everything inside of this fireball vaporizes, including soil and water, and is carried upwards This creates the mushroom cloud that is associated with a nuclear detonation/blast/explosion