diff --git a/mods/default/nodes.lua b/mods/default/nodes.lua
index 89ef5f95..2bb6ddd3 100644
--- a/mods/default/nodes.lua
+++ b/mods/default/nodes.lua
@@ -427,6 +427,7 @@ minetest.register_node("default:water_flowing", {
 	},
 	alpha = WATER_ALPHA,
 	paramtype = "light",
+	paramtype2 = "flowingliquid",
 	walkable = false,
 	pointable = false,
 	diggable = false,
@@ -436,8 +437,9 @@ minetest.register_node("default:water_flowing", {
 	liquid_alternative_flowing = "default:water_flowing",
 	liquid_alternative_source = "default:water_source",
 	liquid_viscosity = WATER_VISC,
+	freezemelt = "default:snow",
 	post_effect_color = {a=64, r=100, g=100, b=200},
-	groups = {water=3, liquid=3, puts_out_fire=1, not_in_creative_inventory=1},
+	groups = {water=3, liquid=3, puts_out_fire=1, not_in_creative_inventory=1, freezes=1, melt_around=1},
 })
 
 minetest.register_node("default:water_source", {
@@ -466,8 +468,9 @@ minetest.register_node("default:water_source", {
 	liquid_alternative_flowing = "default:water_flowing",
 	liquid_alternative_source = "default:water_source",
 	liquid_viscosity = WATER_VISC,
+	freezemelt = "default:ice",
 	post_effect_color = {a=64, r=100, g=100, b=200},
-	groups = {water=3, liquid=3, puts_out_fire=1},
+	groups = {water=3, liquid=3, puts_out_fire=1, freezes=1},
 })
 
 minetest.register_node("default:lava_flowing", {
@@ -488,6 +491,7 @@ minetest.register_node("default:lava_flowing", {
 		},
 	},
 	paramtype = "light",
+	paramtype2 = "flowingliquid",
 	light_source = LIGHT_MAX - 1,
 	walkable = false,
 	pointable = false,
@@ -558,7 +562,7 @@ minetest.register_node("default:torch", {
 		wall_bottom = {-0.1, -0.5, -0.1, 0.1, -0.5+0.6, 0.1},
 		wall_side = {-0.5, -0.3, -0.1, -0.5+0.3, 0.3, 0.1},
 	},
-	groups = {choppy=2,dig_immediate=3,flammable=1,attached_node=1},
+	groups = {choppy=2,dig_immediate=3,flammable=1,attached_node=1,hot=2},
 	legacy_wallmounted = true,
 	sounds = default.node_sound_defaults(),
 })
@@ -833,7 +837,7 @@ minetest.register_node("default:furnace_active", {
 	paramtype2 = "facedir",
 	light_source = 8,
 	drop = "default:furnace",
-	groups = {cracky=2, not_in_creative_inventory=1},
+	groups = {cracky=2, not_in_creative_inventory=1,hot=1},
 	legacy_facedir_simple = true,
 	sounds = default.node_sound_stone_defaults(),
 	on_construct = function(pos)
@@ -1272,7 +1276,8 @@ minetest.register_node("default:ice", {
 	tiles = {"default_ice.png"},
 	is_ground_content = true,
 	paramtype = "light",
-	groups = {cracky=3},
+	freezemelt = "default:water_source",
+	groups = {cracky=3, melts=1},
 	sounds = default.node_sound_glass_defaults(),
 })
 
@@ -1284,14 +1289,16 @@ minetest.register_node("default:snow", {
 	is_ground_content = true,
 	paramtype = "light",
 	buildable_to = true,
+	leveled = 1,
 	drawtype = "nodebox",
+	freezemelt = "default:water_flowing",
 	node_box = {
-		type = "fixed",
+		type = "leveled",
 		fixed = {
 			{-0.5, -0.5, -0.5,  0.5, -0.5+2/16, 0.5},
 		},
 	},
-	groups = {crumbly=3,falling_node=1},
+	groups = {crumbly=3,falling_node=1, melts=1, float=1},
 	sounds = default.node_sound_dirt_defaults({
 		footstep = {name="default_snow_footstep", gain=0.25},
 		dug = {name="default_snow_footstep", gain=0.75},
@@ -1309,7 +1316,8 @@ minetest.register_node("default:snowblock", {
 	description = "Snow Block",
 	tiles = {"default_snow.png"},
 	is_ground_content = true,
-	groups = {crumbly=3},
+	freezemelt = "default:water_source",
+	groups = {crumbly=3, melts=1},
 	sounds = default.node_sound_dirt_defaults({
 		footstep = {name="default_snow_footstep", gain=0.25},
 		dug = {name="default_snow_footstep", gain=0.75},
diff --git a/mods/fire/init.lua b/mods/fire/init.lua
index d6aee4ab..9acda876 100644
--- a/mods/fire/init.lua
+++ b/mods/fire/init.lua
@@ -9,7 +9,7 @@ minetest.register_node("fire:basic_flame", {
 	}},
 	inventory_image = "fire_basic_flame.png",
 	light_source = 14,
-	groups = {igniter=2,dig_immediate=3},
+	groups = {igniter=2,dig_immediate=3,hot=3},
 	drop = '',
 	walkable = false,
 	buildable_to = true,