diff --git a/app/assets/stylesheets/new_design/_constants.scss b/app/assets/stylesheets/new_design/_constants.scss
index 8429f3f29..fca67e46a 100644
--- a/app/assets/stylesheets/new_design/_constants.scss
+++ b/app/assets/stylesheets/new_design/_constants.scss
@@ -7,3 +7,6 @@ $default-padding: 2 * $default-spacer;
 // layouts
 $two-columns-padding: 60px;
 $two-columns-breakpoint: $page-width + (2 * $two-columns-padding);
+
+// z-order
+$alert-z-index: 100;
diff --git a/app/assets/stylesheets/new_design/new_alert.scss b/app/assets/stylesheets/new_design/new_alert.scss
index 37dbe064b..acb0d6619 100644
--- a/app/assets/stylesheets/new_design/new_alert.scss
+++ b/app/assets/stylesheets/new_design/new_alert.scss
@@ -1,4 +1,5 @@
 @import "colors";
+@import "constants";
 
 .alert {
   padding: 15px;
@@ -28,4 +29,6 @@
   width: 200px;
   top: 10px;
   border-radius: 10px;
+  // Ensure fixed flash messages are above `position: absolute` elements (like maps)
+  z-index: $alert-z-index;
 }