Today's spells are Hydromancy spells, which means that they appear on the spell list for the new Hydromancer feat in the compendium, and they thus activate the feat's special abilities. These feats are designed, among other things, to unify thematic concepts that can stretch across multiple damage types, making other forms of conventional specialization (such as damage type synergies) less resonant for these things. Steam spells are a great example, as they deal fire damage but they appear on the Hydromancy spell list (which also contains spells that deal bludgeoning damage, cold damage, and more) and not on the Pyromancy spell list (also new in the compendium), which doesn't necessarily contain every spell that deals the fire damage type.