Firestorm's unique nuclear-molecular structure allows him control over the structure of matter, allowing him to reshape it into any form desired. Firestorm can disperse his own molecular structure in order to pass through solid matter. His matter control allows him to "see" patterns in matter, enabling him to perceive heat patterns, as well as see through the use of radio waves and radar. He can basically turn anything into anything. Water to Magnesium. Steel to Plutonium.