diff --git a/charts/base-cluster/templates/backup/velero.yaml b/charts/base-cluster/templates/backup/velero.yaml
index 7b72def267..de2863fa19 100644
--- a/charts/base-cluster/templates/backup/velero.yaml
+++ b/charts/base-cluster/templates/backup/velero.yaml
@@ -102,5 +102,7 @@ spec:
             expr: velero_backup_last_status{schedule!=""} != 1
             for: 15m
             labels:
-              severity: warning
+              severity: critical
+              period: WorkingHours
+
 {{- end }}
diff --git a/charts/base-cluster/templates/cert-manager/rules/certificate-expiration.yaml b/charts/base-cluster/templates/cert-manager/rules/certificate-expiration.yaml
index 41b0a046e1..e3f60b97ef 100644
--- a/charts/base-cluster/templates/cert-manager/rules/certificate-expiration.yaml
+++ b/charts/base-cluster/templates/cert-manager/rules/certificate-expiration.yaml
@@ -24,7 +24,8 @@ spec:
             certmanager_certificate_expiration_timestamp_seconds and (certmanager_certificate_expiration_timestamp_seconds - time() <= (60 * 60 * 24 * 14))
           for: 5m
           labels:
-            severity: warning
+            severity: critical
+            period: WorkingHours
         - alert: CertificateExpiringSoon
           annotations:
             description: {{ "Certificate {{ $labels.exported_namespace }}/{{ $labels.name }} will expire in less than 1 week. The certificate will expire at {{ humanizeTimestamp $value }}" | quote }}
@@ -34,4 +35,5 @@ spec:
           for: 5m
           labels:
             severity: critical
+            period: WorkingHours
   {{- end -}}
diff --git a/charts/base-cluster/templates/flux/rules/flux-status.yaml b/charts/base-cluster/templates/flux/rules/flux-status.yaml
index 988999dc56..ddfae6cdb3 100644
--- a/charts/base-cluster/templates/flux/rules/flux-status.yaml
+++ b/charts/base-cluster/templates/flux/rules/flux-status.yaml
@@ -24,7 +24,8 @@ spec:
             gotk_reconcile_condition_info{type="Ready",status="False"} == 1
           for: 10m
           labels:
-            severity: warning
+            severity: critical
+            period: WorkingHours
         - alert: MetricsMissing
           annotations:
             description: The flux metrics are missing
@@ -34,4 +35,5 @@ spec:
           for: 5m
           labels:
             severity: critical
+            period: WorkingHours
   {{- end }}
diff --git a/charts/base-cluster/templates/monitoring/kdave/rules/releases-with-deprecation.yaml b/charts/base-cluster/templates/monitoring/kdave/rules/releases-with-deprecation.yaml
index 0313dd71bf..f013cbb152 100644
--- a/charts/base-cluster/templates/monitoring/kdave/rules/releases-with-deprecation.yaml
+++ b/charts/base-cluster/templates/monitoring/kdave/rules/releases-with-deprecation.yaml
@@ -24,7 +24,8 @@ spec:
             wf_k8s_deployed_releases_with_deprecated_api_version > 0
           for: 5m
           labels:
-            severity: warning
+            severity: critical
+            period: WorkingHours
         - alert: ReleasesHaveRemovedAPIs
           annotations:
             description: {{ "{{ $value }} releases have removed APIs." | quote }}
@@ -34,4 +35,5 @@ spec:
           for: 5m
           labels:
             severity: critical
+            period: WorkingHours
   {{- end -}}
diff --git a/charts/base-cluster/templates/nfs-server-provisioner/rules/storage-size.yaml b/charts/base-cluster/templates/nfs-server-provisioner/rules/storage-size.yaml
index 0ce7bdb06a..579bed27dd 100644
--- a/charts/base-cluster/templates/nfs-server-provisioner/rules/storage-size.yaml
+++ b/charts/base-cluster/templates/nfs-server-provisioner/rules/storage-size.yaml
@@ -25,5 +25,6 @@ spec:
               sum(kube_persistentvolumeclaim_resource_requests_storage_bytes{namespace="nfs-server-provisioner",persistentvolumeclaim="data-nfs-server-provisioner-0"})) > 0
           for: 1m
           labels:
-            severity: warning
+            severity: critical
+            period: WorkingHours
 {{- end }}