diff --git a/micro_ondes/esp_lora/lib/microwaveScreen.py b/micro_ondes/esp_lora/lib/microwaveScreen.py
index dde160d..1f5224b 100644
--- a/micro_ondes/esp_lora/lib/microwaveScreen.py
+++ b/micro_ondes/esp_lora/lib/microwaveScreen.py
@@ -126,7 +126,6 @@ class MicrowaveScreen:
         self.h_centered_text(text, 29, 0)
         
     def message(self, text, alert):
-        self.flick()
+        # self.flick()
         self._message(text, alert)
         self.show()
-        pass
diff --git a/micro_ondes/esp_lora/main.py b/micro_ondes/esp_lora/main.py
index cd12d71..9780a70 100644
--- a/micro_ondes/esp_lora/main.py
+++ b/micro_ondes/esp_lora/main.py
@@ -17,6 +17,7 @@ from shared.uart_comm import UARTCommand, UARTCommandType
 from shared.sensors import RGBLED
 from shared.logging import log
 from shared.lora_device import LoraCommands
+from shared.alerts import Alert, AlertType, AlertManager
 
 # --- READ DEVICE ID ---
 try:
@@ -37,6 +38,7 @@ current_temp = [None, None]
 last_temp = [None, None]
 temperature_asked = False
 last_temp_request_time = 0
+alert_manager = None
 
 
 PING_PAYLOAD = {
@@ -44,6 +46,11 @@ PING_PAYLOAD = {
     "type": deviceTypes.DEVICE_TYPES["MICROWAVE"]
 }
 
+def on_new_alert(alert: Alert):
+    global microwave_screen
+    print(f"[Alert Manager] New alert received: {alert.to_dict()}")
+    microwave_screen.message(alert.message, True)
+
 def init_hardware():
     """Initializes all hardware components."""
     global lora, uart_device, magnetron_led, microwave_screen
@@ -247,8 +254,13 @@ async def lora_process_task():
                         print("[LoRa Process] Toggling defrost mode via orchestrator command.")
                         defrost_mode = data["defrost_state"]
                         microwave_screen.update(cooking_state, defrost_mode)
+                    elif data["action"] == LoraCommands.NEW_ALERT:
+                        alert = Alert(data.get("alert_type"), data.get("message", "Unsafe area"))
+                        alert.timestamp = data.get("timestamp", time.time())
+                        print(f"[LoRa Process] New alert received via orchestrator: {alert.to_dict()}")
+                        alert_manager.add_alert(alert)
                             
-        await asyncio.sleep_ms(50)
+        await asyncio.sleep_ms(100)
 
 
 async def cooking_loop_task():
@@ -276,11 +288,14 @@ async def memory_cleanup_task():
 
 # --- BOOTSTRAP ---
 async def main():
-    global cooking_state, defrost_mode, microwave_screen
+    global cooking_state, defrost_mode, microwave_screen, alert_manager
     print("[Main] Starting application...")
     
     init_hardware()
     
+    alert_manager = AlertManager()
+    alert_manager.set_on_alert_callback(on_new_alert)
+    
     # Launch dedicated hardware thread for LoRa RX
     try:
         _thread.stack_size(16 * 1024)
diff --git a/orchestrateur/main.py b/orchestrateur/main.py
index 4dd84cd..3b766fb 100644
--- a/orchestrateur/main.py
+++ b/orchestrateur/main.py
@@ -9,6 +9,7 @@ from shared import get_lora, get_mqtt_client, deviceTypes, config, payloads, db
 from shared.logging import log
 from shared.cookingState import CookingStates
 from shared.lora_device import LoraCommands
+from shared.alerts import AlertManager, Alert, AlertType
 from sensors import ultrasonicRanger, temp_hum, button, camera, buzzer
 from lib.systemd_logs import get_systemd_logs
 
@@ -76,7 +77,6 @@ async_event_queue = None
 ir_data_cache = {}   # mw_id -> dict of IR readings
 ir_data_events = {}  # mw_id -> asyncio.Event()
 
-
 # --- HARDWARE & MQTT SETUP ---
 lora = get_lora()
 lora.configure()
@@ -188,6 +188,28 @@ def button_callback():
 button.set_callback(button_callback)
 button.start_button_monitoring_thread()
 
+# --- Alert manager ---
+alert_manager = None
+
+def on_new_alert(alert):
+    # Sends to cloud server
+    alert_dict = alert.to_dict()
+    alert_dict["orchestrator_id"] = DEVICE_ID
+    
+    response = requests.post(
+        "https://smartwave.matthiasg.dev/alert", 
+        json=alert_dict,
+    )
+
+    response.raise_for_status()
+    res_json = response.json()
+    print(f"[Alert Handling] Alert sent to cloud: {alert_dict}, Response: {res_json}")
+    
+    # Send the alert to the lora device
+    lora.send_reliable(payloads.lora_new_alert(alert))
+    
+    # TODO : envoi de l'alerte aux écrans externes
+
 # --- HARDWARE CONTROLLERS ---
 def _stop_hardware(microwave_id: str):
     print(f"[{microwave_id}] /!\\ Emergency stop issued to hardware.")
@@ -268,7 +290,7 @@ async def handle_new_dish(microwave_id, detected_height):
 
 async def request_cloud_cooking_plan(microwave_id, sensors_data):
     """Sends all data to the cloud with up to 3 retries (330s timeout for AI generation)."""
-    global cloud_alert
+    global cloud_alert, alert_manager
     microwave_states[microwave_id] = MicrowaveState.WAITING_FOR_CLOUD
     URL = "https://smartwave.matthiasg.dev/cooking-params"
     
@@ -306,8 +328,22 @@ async def request_cloud_cooking_plan(microwave_id, sensors_data):
 
             response.raise_for_status()
 
-            # Robust JSON extraction: handles direct dict or nested {"cook_plan": {...}}
+            # JSON extraction
             res_json = response.json()
+            
+            # Error handling
+            if "error" in res_json:
+                print(f"[{microwave_id}] Cloud API returned error: {res_json['error']}")
+                microwave_states[microwave_id] = MicrowaveState.DONE
+                
+                if not res_json['is_safe']: # The cooking area is not safe, raise an alert
+                    alert = Alert(AlertType.COOKING_SAFETY, res_json['warning_message'])
+                    alert_manager.add_alert(alert)
+                else:
+                    alert = Alert(AlertType.ERROR, f"Cloud API error for microwave {microwave_id}: {res_json['error']}")
+                return
+            
+            
             plan = res_json.get("cook_plan", res_json)
 
             c_time = plan.get("cook_time_seconds")
@@ -316,7 +352,7 @@ async def request_cloud_cooking_plan(microwave_id, sensors_data):
             
             if c_time is None or c_power is None or c_temp is None:
                 print(f"[{microwave_id}] ❌ Invalid plan received: {res_json}")
-                microwave_states[microwave_id] = MicrowaveState.DONE
+                microwave_states[microwave_id] = None
                 return
 
             print(f"[{microwave_id}] Cloud Plan Received! Starting microwave: {c_time}s @ {c_power}W")
@@ -335,6 +371,9 @@ async def request_cloud_cooking_plan(microwave_id, sensors_data):
             return
 
         except Exception as e:
+            # Print stacktrace
+            import traceback
+            traceback.print_exc()
             print(f"[{microwave_id}] Cloud API Error (Attempt {attempt}/{max_retries}): {e}")
             
             if attempt < max_retries:
@@ -540,6 +579,11 @@ async def main():
     global async_event_queue
     print("Orchestrateur prêt. Lancement des tâches...")
     
+    # Initialize the alert manager and set the callback
+    global alert_manager
+    alert_manager = AlertManager()
+    alert_manager.set_on_alert_callback(on_new_alert)
+    
     # Initialize SQLite database table
     init_db()
     
diff --git a/shared/__init__.py b/shared/__init__.py
index df1e3fd..7875fa0 100644
--- a/shared/__init__.py
+++ b/shared/__init__.py
@@ -6,6 +6,7 @@ import shared.config as config
 import shared.payloads as payloads
 import shared.cookingState as cookingState
 import shared.safeQueue as safeQueue
+import shared.alerts as alerts
 try:
     import shared.lora_device as lora_device
 except ImportError:
diff --git a/shared/alerts.py b/shared/alerts.py
new file mode 100644
index 0000000..6c358fe
--- /dev/null
+++ b/shared/alerts.py
@@ -0,0 +1,47 @@
+import time
+
+class AlertManager:
+    def __init__(self):
+        self.alerts = []
+        self.on_alert_callback = None
+        
+    def set_on_alert_callback(self, callback):
+        self.on_alert_callback = callback
+
+    def add_alert(self, alert):
+        self.alerts.append(alert)
+        if self.on_alert_callback:
+            self.on_alert_callback(alert)
+
+    def get_alerts(self):
+        return self.alerts
+
+    def clear_alerts(self):
+        self.alerts.clear()
+    
+class Alert:
+    def __init__(self, alertType: "AlertType", message: str):
+        self.alertType = alertType
+        self.message = message
+        self.timestamp = time.time()
+
+    def to_dict(self):
+        return {
+            "type": self.alertType,
+            "message": self.message,
+            "timestamp": self.timestamp
+        }
+        
+    def to_json(self):
+        import json
+        return json.dumps(self.to_dict())
+    
+    def from_json(json_string: str) -> "Alert":
+        import json
+        data = json.loads(json_string)
+        alert = Alert(data["type"], data["message"])
+        alert.timestamp = data["timestamp"]
+        return alert
+        
+class AlertType:
+    COOKING_SAFETY = "COOKING_SAFETY"
\ No newline at end of file
diff --git a/shared/payloads.py b/shared/payloads.py
index 8d98b02..10c906f 100644
--- a/shared/payloads.py
+++ b/shared/payloads.py
@@ -1,5 +1,11 @@
 from time import time
 from shared.deviceTypes import DEVICE_TYPES
+from shared.alerts import Alert, AlertType
+import shared.config as config
+try:
+    from shared.lora_device import LoraCommands
+except ImportError:
+    pass  # No need
 
 
 try:
@@ -65,4 +71,10 @@ def telemetry_payload(device_id, microwave_states, button_state, cloud_alert, gp
         "ambient_humidity": ambient_humidity,
         "connected_components": connected_components,
         "logs": logs
-    })
\ No newline at end of file
+    })
+    
+def lora_new_alert(alert: Alert):
+    return {
+        "action": LoraCommands.NEW_ALERT,
+        "alert_type": alert.alertType
+    }
\ No newline at end of file