diff --git a/.github/actions/deploy-environment/action.yml b/.github/actions/deploy-environment/action.yml
index 0a62d165..282201d4 100644
--- a/.github/actions/deploy-environment/action.yml
+++ b/.github/actions/deploy-environment/action.yml
@@ -47,15 +47,47 @@ runs:
       run: |
         access_url=$(terraform -chdir=terraform/application output -json urls | jq -r '.[0]')
         echo "ACCESS_URL=$access_url" >> $GITHUB_OUTPUT
+        check_url=$(terraform -chdir=terraform/application output -json urls | jq -r '.[1]')
+        echo "CHECK_URL=$check_url" >> $GITHUB_OUTPUT
+
+        access_external_domain=$(terraform -chdir=terraform/application output -raw local.access_external_domain 2>/dev/null || echo "")
+        check_external_domain=$(terraform -chdir=terraform/application output -raw local.check_external_domain 2>/dev/null || echo "")
+        echo "ACCESS_EXTERNAL_DOMAIN=$access_external_domain" >> $GITHUB_OUTPUT
+        echo "CHECK_EXTERNAL_DOMAIN=$check_external_domain" >> $GITHUB_OUTPUT
 
     - name: Run smoke tests
       shell: bash
       run: |
-        # Parse the JSON array of URLs into a Bash array
-        urls=$(echo "$HOSTNAMES" | jq -r '.[]')
+        # Parse the JSON array of internal URLs into a Bash array
+        internal_urls=$(terraform -chdir=terraform/application output -json urls | jq -r '.[]')
+
+        # Get the external domains
+        access_external_domain="${{ steps.set_outputs.outputs.ACCESS_EXTERNAL_DOMAIN }}"
+        check_external_domain="${{ steps.set_outputs.outputs.CHECK_EXTERNAL_DOMAIN }}"
+
+        echo "Internal URLs:"
+        echo "$internal_urls"
 
-        # Loop over each URL and perform the curl check on the /health/all.json endpoint
-        for url in $urls; do
+        # Function to perform health check
+        perform_health_check() {
+          local url="$1"
+          echo "Check health for $url..."
+          curl -sS --fail "$url" > /dev/null && echo "Health check passed for $url" || echo "Health check failed for $url"
           echo "Check health for $url/health/all.json..."
-          curl -sS --fail "$url/health/all.json" > /dev/null && echo "Health check passed for $url" || echo "Health check failed for $url"
+          curl -sS --fail "$url/health/all.json" > /dev/null && echo "Health check passed for $url/health/all.json" || echo "Health check failed for $url/health/all.json"
+        }
+
+        # Loop over each internal URL and perform the health checks
+        for url in $internal_urls; do
+          perform_health_check "$url"
         done
+
+        # Perform health checks on external domains if they exist
+        if [ -n "$access_external_domain" ] && [ -n "$check_external_domain" ]; then
+          echo "Access External Domain: $access_external_domain"
+          echo "Check External Domain: $check_external_domain"
+          perform_health_check "https://$access_external_domain"
+          perform_health_check "https://$check_external_domain"
+        else
+          echo "External domains not available. Skipping external health checks."
+        fi