Preliminary

code/modules/mob/living/carbon/human/human_defense.dm

@@ -577,7 +577,7 @@ emp_act
 // This is for preventing harm by being covered in water, which only prometheans need to deal with.
 // This is not actually used for now since the code for prometheans gets changed a lot.
 /mob/living/carbon/human/get_water_protection()
-	var/protection = ..() // Todo: Replace with species var later.
+	var/protection = species.water_resistance
 	if(protection == 1) // No point doing permeability checks if it won't matter.
 		return protection
 	// Wearing clothing with a low permeability_coefficient can protect from water.
@@ -585,7 +585,7 @@ emp_act
 	var/converted_protection = 1 - protection
 	var/perm = reagent_permeability()
 	converted_protection *= perm
-	return 1-converted_protection
+	return CLAMP(1-converted_protection, 0, 1)
 
 
 /mob/living/carbon/human/shank_attack(obj/item/W, obj/item/weapon/grab/G, mob/user, hit_zone)

code/modules/mob/living/carbon/human/species/species.dm

@@ -142,6 +142,7 @@
 		"Your skin prickles in the heat."
 		)
 
+	var/water_resistance = 0.1								// How wet the species gets from being splashed. Only really useful for Prometheans.
 
 	var/passive_temp_gain = 0								// Species will gain this much temperature every second
 	var/hazard_high_pressure = HAZARD_HIGH_PRESSURE			// Dangerously high pressure.

code/modules/mob/living/carbon/human/species/station/prometheans.dm

@@ -71,6 +71,8 @@ var/datum/species/shapeshifter/promethean/prometheans
 	rarity_value = 5
 	siemens_coefficient = 0.8
 
+	water_resistance = 0
+
 	genders = list(MALE, FEMALE, NEUTER, PLURAL)
 
 	unarmed_types = list(/datum/unarmed_attack/slime_glomp)
@@ -166,8 +168,8 @@ var/datum/species/shapeshifter/promethean/prometheans
 	var/regen_burn = TRUE
 	var/regen_tox = TRUE
 	var/regen_oxy = TRUE
-	if(H.fire_stacks < 0)	// If you're soaked, you're melting.
-		H.adjustToxLoss(3 * heal_rate)	// Tripled because 0.5 is miniscule, and fire_stacks are capped in both directions
+	if(H.fire_stacks < 0 && H.get_water_protection() <= 0.5)	// If over half your body is soaked, you're melting.
+		H.adjustToxLoss(max(0,(3 - (3 * H.get_water_protection())) * heal_rate))	// Tripled because 0.5 is miniscule, and fire_stacks are capped in both directions.
 		healing = FALSE
 
 	//Prometheans automatically clean every surface they're in contact with every life tick - this includes the floor without shoes.