"Steam" - is a symbol of the "irrigation" of the "Earth", i.e. the practical experience of those people who had only earthly, creaturely interests, lived a purely materialistic way of life, i.e. who had not yet been spiritualized by God's Word to a true righteous life, - who had not yet recognized and fulfilled God's Will, and therefore had not acquired the spiritual "Image" and "Likeness" of God, i.e. who had not yet been called by God by the word "Man".
"Steam" - is the initial cognition of the surrounding world by man, contributing to the beginning of his spiritual formation, formation.
"Steam" - This is also a symbol of short-lived, fragile human physical life, changeability of sinful patterns, morals, beliefs of man.