diff --git a/OpenRA.Game/Combat.cs b/OpenRA.Game/Combat.cs
index 0bf322fe9d..e9e1e65e55 100644
--- a/OpenRA.Game/Combat.cs
+++ b/OpenRA.Game/Combat.cs
@@ -76,13 +76,10 @@ namespace OpenRA
 				case DamageModel.PerCell:
 					{
 						foreach (var t in world.FindTilesInCircle(targetTile, warhead.SmudgeSize[0]))
-						{
-							var x = Util.CenterOfCell(t);
-							foreach (var unit in world.FindUnits(x, x))
+							foreach (var unit in world.FindUnits(Game.CellSize * t, Game.CellSize * (t + new float2(1,1))))
 								unit.InflictDamage(args.firedBy,
 									(int)(warhead.Damage * warhead.EffectivenessAgainst(
 									unit.Info.Traits.Get<OwnedActorInfo>().Armor)), warhead);
-						}
 					} break;
 			}
 		}
diff --git a/OpenRA.Game/Smudge.cs b/OpenRA.Game/Smudge.cs
index 3b2cf24e2c..714305b22b 100644
--- a/OpenRA.Game/Smudge.cs
+++ b/OpenRA.Game/Smudge.cs
@@ -53,7 +53,8 @@ namespace OpenRA
 			else
 				foreach (var t in Game.world.FindTilesInCircle(targetTile, warhead.SmudgeSize[0]))
 					if ((t - targetTile).LengthSquared >= warhead.SmudgeSize[1] * warhead.SmudgeSize[1])
-						map.AddSmudge(warhead.SmudgeType == SmudgeType.Crater, t.X, t.Y);
+						if (Game.world.GetTerrainType(t) != TerrainType.Water)
+							map.AddSmudge(warhead.SmudgeType == SmudgeType.Crater, t.X, t.Y);
 		}
 
 		static int lastSmudge = 0;
diff --git a/mods/ra/weapons.yaml b/mods/ra/weapons.yaml
index bf14ed18c4..2ef75351fd 100644
--- a/mods/ra/weapons.yaml
+++ b/mods/ra/weapons.yaml
@@ -640,7 +640,6 @@ Atomic:
 	Warhead@inner-nuke:
 		DamageModel: PerCell
 		Damage: 150
-		SmudgeType: Scorch
 		SmudgeSize: 3,2
 		Wall: true
 		Wood: true