diff --git a/backend/test_alertsystem.py b/backend/test_alertsystem.py
index db57d2b..9429c48 100644
--- a/backend/test_alertsystem.py
+++ b/backend/test_alertsystem.py
@@ -1,7 +1,19 @@
 import pytest
 import requests
 from unittest.mock import patch
-from backend.alertsystem import fetch_gis_alert_data
+from backend.alertsystem import fetch_gis_alert_data, app
+
+@pytest.fixture
+def client():
+    app.testing = True
+    
+    with app.test_client() as client:
+        yield client
+
+@patch.dict('os.environ', {}, clear=True)
+def test_missing_api_key_returns_500(client):
+    response = client.post("/weather", json={"city": "DummyCity", "state": "DummyState", "country": "DummyCountry"})
+    assert response.status_code == 500
 
 @patch('requests.get')
 def test_gis_api_down_returns_503(mock_get):
@@ -16,3 +28,17 @@ def test_gis_api_timeout_returns_504(mock_get):
     mock_get.side_effect = requests.exceptions.Timeout()
     response, status_code = fetch_gis_alert_data()
     assert status_code == 504
+
+def test_weather_missing_fields_returns_400(client):
+    response = client.post("/weather", json={})
+    assert response.status_code == 400
+
+@patch.dict('os.environ', {'OPENWEATHER_API_KEY': 'dummy_key'})
+@patch('requests.get')
+def test_location_not_found_returns_404(mock_get, client):
+    mock_response = mock_get.return_value
+    mock_response.raise_for_status.return_value = None
+    mock_response.json.return_value = []
+    
+    response = client.post("/weather", json={"city": "dummyCity", "state": "dummyState", "country": "dummyCountry"})
+    assert response.status_code == 404
\ No newline at end of file