I have an issue with A Loop that doesn't stop working after an action is taken. How do I fix it?

Hello, Yesterday I asked for help concerning a code i've been working on, and was able to get some, however more issues came up and am wondering if there is a way to fix the problem. I am trying to create a setting where if a player touches fire, they receive burn damage and fire/smoke effects till the touch the water. However, when the player touches fire, the loop goes on only once, and when touching the water, the effects of fire/smoke leaves but the burn damage stays and acts in a weird manner.

This is my fire Code

local Players = game.Players

firePart.Transparency = 1

local Lava = function(hitPart)
	if hitPart.Parent:FindFirstChild("Humanoid") then
		
			hitPart.Parent.Humanoid.Health = 100
			
		if hitPart.Parent.Humanoid.Health > 0 then
			local Parts = hitPart.Parent:GetChildren()
			for i, Parts in pairs(Parts) do
				if Parts:IsA("BasePart") then
					Instance.new("Fire", Parts)
					Instance.new("Smoke", Parts)
					if Parts:FindFirstChild("Fire") then
						repeat wait()
							hitPart.Parent.Humanoid.Health = 100
							hitPart.Parent.Humanoid.Health = hitPart.Parent.Humanoid.Health - 10
							wait(0.5)
						until Parts:FindFirstChild("Fire") == false
					end
			
				end
			end
			
		end
	end
end

firePart.Touched:Connect(Lava)~~

And this is my water code

local waterPart = script.Parent
waterPart.Transparency = 1
local function PutOutFire(part)
	if part.Parent.Humanoid then
	local human = part.Parent:GetChildren()
	 
	 
	for i, human in pairs(human) do
	    if human:FindFirstChild("Smoke") then
	        human:FindFirstChild("Smoke"):Destroy()
	 
	    end
	    if human:FindFirstChild("Fire") then
	        human:FindFirstChild("Fire"):Destroy()
	    end
	end
	    end
	end

waterPart.Touched:connect(PutOutFire)

what will I need to do to fix it?