diff --git a/Source/Game/Entities/Player/Player.cs b/Source/Game/Entities/Player/Player.cs
index 2214de536..d59deec8d 100644
--- a/Source/Game/Entities/Player/Player.cs
+++ b/Source/Game/Entities/Player/Player.cs
@@ -4034,6 +4034,20 @@ namespace Game.Entities
             int fatigueTimer = (int)MirrorTimerType.Fatigue;
             int fireTimer = (int)MirrorTimerType.Fire;
 
+            uint getEnvironmentalDamage(EnviromentalDamage damageType)
+            {
+                byte damagePercent = 10;
+                if (damageType == EnviromentalDamage.Drowning || damageType == EnviromentalDamage.Exhausted)
+                    damagePercent *= 2;
+
+                uint damage = (uint)(GetMaxHealth() * damagePercent / 100);
+
+                // Randomize damage
+                damage += RandomHelper.URand(0, Math.Pow(10, Math.Max(0, (int)Math.Log10(damage) - 1)));
+
+                return damage;
+            }
+
             // In water
             if (m_MirrorTimerFlags.HasAnyFlag(PlayerUnderwaterState.InWater))
             {
@@ -4051,8 +4065,7 @@ namespace Game.Entities
                     {
                         m_MirrorTimer[breathTimer] += 1 * Time.InMilliseconds;
                         // Calculate and deal damage
-                        // @todo Check this formula
-                        uint damage = (uint)(GetMaxHealth() / 5 + RandomHelper.URand(0, GetLevel() - 1));
+                        uint damage = getEnvironmentalDamage(EnviromentalDamage.Drowning);
                         EnvironmentalDamage(EnviromentalDamage.Drowning, damage);
                     }
                     else if (!m_MirrorTimerFlagsLast.HasAnyFlag(PlayerUnderwaterState.InWater))      // Update time in client if need
@@ -4088,7 +4101,7 @@ namespace Game.Entities
                         m_MirrorTimer[fatigueTimer] += 1 * Time.InMilliseconds;
                         if (IsAlive())                                            // Calculate and deal damage
                         {
-                            uint damage = (uint)(GetMaxHealth() / 5 + RandomHelper.URand(0, GetLevel() - 1));
+                            uint damage = getEnvironmentalDamage(EnviromentalDamage.Exhausted);
                             EnvironmentalDamage(EnviromentalDamage.Exhausted, damage);
                         }
                         else if (HasPlayerFlag(PlayerFlags.Ghost))       // Teleport ghost to graveyard
@@ -4120,8 +4133,7 @@ namespace Game.Entities
                     {
                         m_MirrorTimer[fireTimer] += 1 * Time.InMilliseconds;
                         // Calculate and deal damage
-                        // @todo Check this formula
-                        uint damage = RandomHelper.URand(600, 700);
+                        uint damage = getEnvironmentalDamage(EnviromentalDamage.Lava);
                         if (m_MirrorTimerFlags.HasAnyFlag(PlayerUnderwaterState.InLava))
                             EnvironmentalDamage(EnviromentalDamage.Lava, damage);
                         // need to skip Slime damage in Undercity,