Client
function watercheck()
        if (isElementInWater(localPlayer)) then
                triggerServerEvent("deathrun.killSource", localPlayer, localPlayer)
                setElementData(localPlayer,"dead",true)
        else
                return false
        end
end
setTimer(watercheck, 50, 0)


Server

    function DTXf()
       if getElementData(thePlayer,"dead") then
            killPed(thePlayer)
            outputChatBox("You Bitch Can't Swim!", plr)
            setElementData(thePlayer,"dead",false)
        end
    end
    addEvent("deathrun.killSource", true)
    addEventHandler("deathrun.killSource", root, DTXf)