diff --git a/Content.Server/Atmos/IGridAtmosphereComponent.cs b/Content.Server/Atmos/IGridAtmosphereComponent.cs
index fd5648c091..e16d630708 100644
--- a/Content.Server/Atmos/IGridAtmosphereComponent.cs
+++ b/Content.Server/Atmos/IGridAtmosphereComponent.cs
@@ -1,6 +1,7 @@
 using System.Collections.Generic;
 using Robust.Shared.Interfaces.GameObjects;
 using Robust.Shared.Map;
+using Robust.Shared.Maths;
 
 namespace Content.Server.Atmos
 {
@@ -151,6 +152,11 @@ namespace Content.Server.Atmos
         /// <returns></returns>
         float GetVolumeForCells(int cellCount);
 
+        /// <summary>
+        ///     Returns a dictionary of adjacent TileAtmospheres.
+        /// </summary>
+        Dictionary<Direction, TileAtmosphere> GetAdjacentTiles(MapIndices indices, bool includeAirBlocked = false);
+
         void Update(float frameTime);
     }
 }
diff --git a/Content.Server/GameObjects/Components/Atmos/FirelockComponent.cs b/Content.Server/GameObjects/Components/Atmos/FirelockComponent.cs
index 02d3ac22a5..03ec350359 100644
--- a/Content.Server/GameObjects/Components/Atmos/FirelockComponent.cs
+++ b/Content.Server/GameObjects/Components/Atmos/FirelockComponent.cs
@@ -1,35 +1,36 @@
-using System.Threading.Tasks;
+using System;
+using System.Threading.Tasks;
+using Content.Server.Atmos;
 using Content.Server.GameObjects.Components.Doors;
 using Content.Server.GameObjects.Components.Interactable;
+using Content.Server.Interfaces;
 using Content.Shared.GameObjects.Components.Doors;
 using Content.Shared.GameObjects.Components.Interactable;
 using Content.Shared.Interfaces.GameObjects.Components;
 using Robust.Shared.GameObjects;
 using Robust.Shared.GameObjects.Components;
 using Robust.Shared.Interfaces.GameObjects;
+using Robust.Shared.IoC;
 
 namespace Content.Server.GameObjects.Components.Atmos
 {
     [RegisterComponent]
-    public class FirelockComponent : ServerDoorComponent, IInteractUsing, IActivate, ICollideBehavior
+    public class FirelockComponent : ServerDoorComponent, IInteractUsing, ICollideBehavior
     {
+        [Dependency] private IServerNotifyManager _notifyManager = default!;
+
         public override string Name => "Firelock";
 
-        public override void Initialize()
-        {
-            base.Initialize();
-        }
+        protected override TimeSpan CloseTimeOne => TimeSpan.FromSeconds(0.1f);
+        protected override TimeSpan CloseTimeTwo => TimeSpan.FromSeconds(0.6f);
+        protected override TimeSpan OpenTimeOne => TimeSpan.FromSeconds(0.1f);
+        protected override TimeSpan OpenTimeTwo => TimeSpan.FromSeconds(0.6f);
 
         public void CollideWith(IEntity collidedWith)
         {
             // We do nothing.
         }
 
-        public void Activate(ActivateEventArgs eventArgs)
-        {
-            // We do nothing.
-        }
-
         protected override void Startup()
         {
             base.Startup();
@@ -60,26 +61,41 @@ namespace Content.Server.GameObjects.Components.Atmos
             return closed;
         }
 
-        public override void Deny()
+        public override bool CanOpen()
         {
+            return !IsHoldingFire() && !IsHoldingPressure() && base.CanOpen();
         }
 
         public override bool CanClose(IEntity user) => true;
-        public override bool CanOpen(IEntity user) => true;
+        public override bool CanOpen(IEntity user) => CanOpen();
 
         public async Task<bool> InteractUsing(InteractUsingEventArgs eventArgs)
         {
             if (!eventArgs.Using.TryGetComponent<ToolComponent>(out var tool))
                 return false;
 
-            if (!await tool.UseTool(eventArgs.User, Owner, 3f, ToolQuality.Prying)) return false;
+            if (tool.HasQuality(ToolQuality.Prying))
+            {
+                var holdingPressure = IsHoldingPressure();
+                var holdingFire = IsHoldingFire();
 
-            if (State == DoorState.Closed)
-                Open();
-            else if (State == DoorState.Open)
-                Close();
+                if (State == DoorState.Closed)
+                {
+                    if(holdingPressure)
+                        _notifyManager.PopupMessage(Owner, eventArgs.User, "A gush of air blows in your face... Maybe you should reconsider.");
+                }
 
-            return true;
+                if (!await tool.UseTool(eventArgs.User, Owner, holdingPressure || holdingFire ? 1.5f : 0.25f, ToolQuality.Prying)) return false;
+
+                if (State == DoorState.Closed)
+                    Open();
+                else if (State == DoorState.Open)
+                    Close();
+
+                return true;
+            }
+
+            return false;
         }
     }
 }
diff --git a/Content.Server/GameObjects/Components/Doors/ServerDoorComponent.cs b/Content.Server/GameObjects/Components/Doors/ServerDoorComponent.cs
index 381f276bd0..d2f8f7f65b 100644
--- a/Content.Server/GameObjects/Components/Doors/ServerDoorComponent.cs
+++ b/Content.Server/GameObjects/Components/Doors/ServerDoorComponent.cs
@@ -1,10 +1,12 @@
 using System;
 using System.Linq;
 using System.Threading;
+using Content.Server.Atmos;
 using Content.Server.GameObjects.Components.Access;
 using Content.Server.GameObjects.Components.Atmos;
 using Content.Server.GameObjects.Components.GUI;
 using Content.Server.GameObjects.Components.Mobs;
+using Content.Server.GameObjects.EntitySystems;
 using Content.Shared.Damage;
 using Content.Shared.GameObjects.Components.Body;
 using Content.Shared.GameObjects.Components.Damage;
@@ -49,11 +51,11 @@ namespace Content.Server.GameObjects.Components.Doors
         private AppearanceComponent _appearance;
         private CancellationTokenSource _cancellationTokenSource;
 
-        private static readonly TimeSpan CloseTimeOne = TimeSpan.FromSeconds(0.3f);
-        private static readonly TimeSpan CloseTimeTwo = TimeSpan.FromSeconds(0.9f);
-        private static readonly TimeSpan OpenTimeOne = TimeSpan.FromSeconds(0.3f);
-        private static readonly TimeSpan OpenTimeTwo = TimeSpan.FromSeconds(0.9f);
-        private static readonly TimeSpan DenyTime = TimeSpan.FromSeconds(0.45f);
+        protected virtual TimeSpan CloseTimeOne => TimeSpan.FromSeconds(0.3f);
+        protected virtual TimeSpan CloseTimeTwo => TimeSpan.FromSeconds(0.9f);
+        protected virtual TimeSpan OpenTimeOne => TimeSpan.FromSeconds(0.3f);
+        protected virtual TimeSpan OpenTimeTwo => TimeSpan.FromSeconds(0.9f);
+        protected virtual TimeSpan DenyTime => TimeSpan.FromSeconds(0.45f);
 
         private const int DoorCrushDamage = 15;
         private const float DoorStunTime = 5f;
@@ -263,6 +265,57 @@ namespace Content.Server.GameObjects.Components.Doors
             }
         }
 
+        public bool IsHoldingPressure(float threshold = 20)
+        {
+            var atmosphereSystem = EntitySystem.Get<AtmosphereSystem>();
+
+            if (!Owner.Transform.GridPosition.TryGetTileAtmosphere(out var tileAtmos))
+                return false;
+
+            var gridAtmosphere = atmosphereSystem.GetGridAtmosphere(Owner.Transform.GridID);
+
+            if (gridAtmosphere == null)
+                return false;
+
+            var minMoles = float.MaxValue;
+            var maxMoles = 0f;
+
+            foreach (var (direction, adjacent) in gridAtmosphere.GetAdjacentTiles(tileAtmos.GridIndices))
+            {
+                var moles = adjacent.Air.TotalMoles;
+                if (moles < minMoles)
+                    minMoles = moles;
+                if (moles > maxMoles)
+                    maxMoles = moles;
+            }
+
+            return (maxMoles - minMoles) > threshold;
+        }
+
+        public bool IsHoldingFire()
+        {
+            var atmosphereSystem = EntitySystem.Get<AtmosphereSystem>();
+
+            if (!Owner.Transform.GridPosition.TryGetTileAtmosphere(out var tileAtmos))
+                return false;
+
+            if (tileAtmos.Hotspot.Valid)
+                return true;
+
+            var gridAtmosphere = atmosphereSystem.GetGridAtmosphere(Owner.Transform.GridID);
+
+            if (gridAtmosphere == null)
+                return false;
+
+            foreach (var (direction, adjacent) in gridAtmosphere.GetAdjacentTiles(tileAtmos.GridIndices))
+            {
+                if (adjacent.Hotspot.Valid)
+                    return true;
+            }
+
+            return false;
+        }
+
         public bool Close()
         {
             bool shouldCheckCrush = false;
diff --git a/Resources/Textures/Constructible/Structures/Doors/firelock.rsi/meta.json b/Resources/Textures/Constructible/Structures/Doors/firelock.rsi/meta.json
index c25c825232..08653842b9 100644
--- a/Resources/Textures/Constructible/Structures/Doors/firelock.rsi/meta.json
+++ b/Resources/Textures/Constructible/Structures/Doors/firelock.rsi/meta.json
@@ -7,6 +7,15 @@
     "license": "CC-BY-SA 3.0",
     "copyright": "Taken from https://github.com/tgstation/tgstation at 04e43d8c1d5097fdb697addd4395fb849dd341bd",
     "states": [
+        {
+            "name": "bolted",
+            "directions": 1,
+            "delays": [
+                [
+                    1.0
+                ]
+            ]
+        },
         {
             "name": "closed",
             "directions": 1,
@@ -16,6 +25,15 @@
                 ]
             ]
         },
+        {
+            "name": "closed_unlit",
+            "directions": 1,
+            "delays": [
+                [
+                    1.0
+                ]
+            ]
+        },
         {
             "name": "closing",
             "directions": 1,
@@ -30,6 +48,20 @@
                 ]
             ]
         },
+        {
+            "name": "closing_unlit",
+            "directions": 1,
+            "delays": [
+                [
+                    0.2,
+                    0.2,
+                    0.2,
+                    0.2,
+                    0.2,
+                    0.2
+                ]
+            ]
+        },
         {
             "name": "deny",
             "directions": 1,
@@ -41,6 +73,17 @@
                 ]
             ]
         },
+        {
+            "name": "deny_unlit",
+            "directions": 1,
+            "delays": [
+                [
+                    0.1,
+                    0.1,
+                    0.1
+                ]
+            ]
+        },
         {
             "name": "frame1",
             "directions": 1,
@@ -109,6 +152,20 @@
                 ]
             ]
         },
+        {
+            "name": "opening_unlit",
+            "directions": 1,
+            "delays": [
+                [
+                    0.2,
+                    0.2,
+                    0.2,
+                    0.2,
+                    0.2,
+                    0.2
+                ]
+            ]
+        },
         {
             "name": "panel_closing",
             "directions": 1,