>>36097807No no, not literal ice. Those kind of connections are mostly in the background, but they are consistent.
In Harry Potter, the element of fire is connected to justice, moral courage and Gryffindor House. It represents having a "fiery determination", or whatever. All the Hogwarts Houses are based on the 4 classical elements. Slytherin is water, but it's not the beachy, clear, sunny kind of water. Slytherin is water both because that makes it the opposite to Gryffindor's fire, and because out of the 4 elements, water is the one that most represents cold, and darkness, and therefor death, and evil.
This is why the Slytherin dorms are situated under the Black Lake, where all sorts of funky stuff swims around. It's why Voldemort is often described to have a 'high, cold voice', that chills to the bone. It's why Dementors suck the light and warmth out of a room whenever they're nearby, and they "look like something dead, that had decayed in water".
Basically fire = heat and light = moral goodness = life, and water = cold and darkness = moral impurity = death. Honestly the symbolism for this stuff is all over the place in the books once you know to look for it.