diff --git a/public/modules/ui/heightmap-editor.js b/public/modules/ui/heightmap-editor.js
index d655e39d..3c3d0a6e 100644
--- a/public/modules/ui/heightmap-editor.js
+++ b/public/modules/ui/heightmap-editor.js
@@ -259,6 +259,8 @@ function editHeightmap(options) {
     Rivers.specify();
     Lakes.defineNames();
 
+    Ice.generate();
+
     Military.generate();
     Markers.generate();
     Zones.generate();
@@ -465,6 +467,11 @@ function editHeightmap(options) {
         .attr("id", d => base + d);
     });
 
+    // recalculate ice
+    Ice.clear();
+    Ice.generate();
+    drawIce();
+
     TIME && console.timeEnd("restoreRiskedData");
     INFO && console.groupEnd("Edit Heightmap");
   }