How can I make deadly water? (Like in Build a Boat for Treasure)

What do I want to achieve? I want the water to damage the player every second.

What is the issue? Using the Touched event, will only hurt me if a new body part comes into the water.

What solutions have you tried so far? I tried using Region3, but it was too confusing. If you think Region3 can help, please tell me.

I have a script here using Region3 (I used Alvinblox’s tutorial):

local char = script.Parent
local water = workspace.Ocean.Water
local found = false

	if char.Humanoid.Health > 0 then
		if tostring(prop) ~= 'NetworkOwnerV3' then
			print('Still running [1]')
			local v = char.HumanoidRootPart[prop]
			if v == char.HumanoidRootPart.Position then
				print('Still running [2]')
				local region = - (water.Size / 2), water.Position + (water.Size / 2))
				found = false
				for i, v in pairs(workspace:FindPartsInRegion3WithWhiteList(region, char:GetDescendants())) do
					print('Still running [3]')
					if v:FindFirstAncestor(char:getPlayerFromCharacter().Name) then
						print('Still running [4]')
						found = true
						print('Still running [5]')
						found = false
					print('Still running [6]')
				if found then
					print('Still running [7]')
					char.Humanoid.WalkSpeed = 12
					char.Humanoid.JumpPower = 0
					char.Humanoid.Health -= 5
					print('Still running [8]')
					char.Humanoid.WalkSpeed = 16
					char.Humanoid.JumpPower = 50
				print('Still running [9]')

I keep printing “Still running” to see if it stopped at some point. There are no errors and the output says the same thing and stays the same.


Still running [1] (x2) - Server - DeadlyWater:8
Still running [2] - Server - DeadlyWater:13
Still running [8] - Server - DeadlyWater:44
Still running [9] - Server - DeadlyWater:50

Thank you in advance! (I’ll check this on Tuesday, it’s night time right now)

1 Like

You can use .Touched and put a bool value inside of a player that checks if they’ve touched it or not. (Just insert a new bool value in StarterCharacterScripts and name it whatever you want)

    if Object.Parent:FindFirstChild:("Humanoid") then
          local Character = Object.Parent
          if Character.WaterTouched.Value == true then return end -- this is the value
          Character.WaterTouched.Value = true
          Character.Humanoid:TakeDamage(10) -- your amount of damage here

          Character.WaterTouched.Value = false
1 Like

It works great! Thanks! Can you tell me how I can slow the player down though and make them unable to jump? When they get out of the water they can jump and walk/run perfectly fine. One problem. The player can just freeze in the water standing still and regain health. In my game, I don’t want players to swim all the way to other islands. I want them to buy boats.

to slow down and make then unable to jump set the players walkspeed to 10 and the jumppower to 0 in their humanoid

you can use water:GetTouchingParts() with a loop to constantly check if the player is still touching the water etc

Why not use a variation of a simple kill script in a Transparent, CanCollide False, CanTouch True, Part (or Parts) that are the same size as the water?
This will kill on touch, but if you put a loop in you could make it slowly decrease the player’s Health.

local Kill = script.Parent

local function PlayerTouched(Part)
	local Parent = Part.Parent
	if game.Players:GetPlayerFromCharacter(Parent) then
		Parent.Humanoid.Health = 0


Maybe you could use this with bodyvelocity or the values inside the humanoid

Under the “Character.Humanoid:TakeDamage()” you could do:


Character.Humanoid.WalkSpeed = 5 -- how much you want to reduce, starts at 16
Character.Humanoid.JumpPower = 0 -- starts at 50

Character.Humanoid.WalkSpeed = 16
Character.Humanoid.JumpPower = 50

Character.WaterTouched.Value = false


local BodyVelocity ="BodyVelocity")
BodyVelocity.Parent = Character.HumanoidRootPart

BodyVelocity.MaxForce =,8000,8000)
BodyVelocity.Velocity =, 0.1, 0) -- makes the player go a tenth of a stud higher every time they touch the water, but makes them unable to move (i think lol)


Character.WaterTouched.Value = false

My dearest apologies if there are any mistakes or errors in the script, I just woke up.

With Body Velocity, I can still jump and then I just fly into the air without moving. In my first reply, I said I don’t want the player to stand still and regenerate all their health back that the water just damaged them.

Then yeah, you can just use the Humanoid.WalkSpeed & JumpPower values. They should work fine.

If the player stands still in the water, they’ll regenerate their health I said.

Ah apologies, I probably skipped over that part while reading. Maybe you could make them shake a little while they’re in the water, that should trigger the .Touched event.

What do you mean by shake the player?

I don’t know just do something to them that makes them constantly move.

Just put a tiny bit of a force that constantly moves the player a tiny bit in one direction, then reverses in the other direction.
Just enough to cause movement in relation to whatever is taking the health, whether it’s in your script or a transparent ‘kill’ brick with the health decreasing script put in it Not enough to be noticeable in game.

I tried shaking the player. It just teleports the player somewhere he was one second ago. Should I do Velocity instead?

Yeah maybe you could try that. I suggest just making the velocity decently slow. @Scottifly had some pretty good ideas, maybe you could try that.