diff --git a/packages/SystemUI/res/values/strings.xml b/packages/SystemUI/res/values/strings.xml
index 7bd9526cb2744..be2f8d1664946 100644
--- a/packages/SystemUI/res/values/strings.xml
+++ b/packages/SystemUI/res/values/strings.xml
@@ -1895,6 +1895,13 @@
     <!-- Tuner string -->
     <string name="default_theme" translatable="false">Default</string>
 
+    <!-- Title for notification & dialog that the user's phone last shut down because it got too hot. [CHAR LIMIT=30] -->
+    <string name="thermal_shutdown_title">Phone turned off due to heat</string>
+    <!-- Message body for notification that user's phone last shut down because it got too hot. [CHAR LIMIT=100] -->
+    <string name="thermal_shutdown_message">Your phone is now running normally</string>
+    <!-- Text body for dialog alerting user that their phone last shut down bewcause it got too hot. [CHAR LIMIT=300] -->
+    <string name="thermal_shutdown_dialog_message">Your phone was too hot, so it turned off to cool down. Your phone is now running normally.\n\nYour phone may get too hot if you:\n\t&#8226; Use resource-intensive apps (such as gaming, video, or navigation apps)\n\t&#8226; Download or upload large files\n\t&#8226; Use your phone in high temperatures</string>
+
     <!-- Title for notification (and dialog) that user's phone has reached a certain temperature and may start to slow down in order to cool down. [CHAR LIMIT=30] -->
     <string name="high_temp_title">Phone is getting warm</string>
     <!-- Message body for notification that user's phone has reached a certain temperature and may start to slow down in order to cool down. [CHAR LIMIT=100] -->
diff --git a/proto/src/system_messages.proto b/proto/src/system_messages.proto
index c4a28313ed0a8..65cc17eec6bde 100644
--- a/proto/src/system_messages.proto
+++ b/proto/src/system_messages.proto
@@ -173,6 +173,9 @@ message SystemMessage {
     // Package: android
     NOTE_ACCOUNT_CREDENTIAL_PERMISSION = 38;
 
+    // Inform the user their phone recently shut down due to high temperature
+    NOTE_THERMAL_SHUTDOWN = 39;
+
     // ADD_NEW_IDS_ABOVE_THIS_LINE
     // Legacy IDs with arbitrary values appear below
     // Legacy IDs existed as stable non-conflicting constants prior to the O release