diff --git a/apps/openmw/mwgui/window_manager.cpp b/apps/openmw/mwgui/window_manager.cpp
index 245b364c94..f6e48a28ad 100644
--- a/apps/openmw/mwgui/window_manager.cpp
+++ b/apps/openmw/mwgui/window_manager.cpp
@@ -482,7 +482,8 @@ void WindowManager::changeCell(MWWorld::Ptr::CellStore* cell)
         else
         {
             const ESM::Region* region = MWBase::Environment::get().getWorld()->getStore().regions.search(cell->cell->region);
-            name = region->name;
+            if (region)
+                name = region->name;
         }
 
         map->setCellName( name );
diff --git a/apps/openmw/mwworld/scene.cpp b/apps/openmw/mwworld/scene.cpp
index af7e21d7f5..94f0c69a95 100644
--- a/apps/openmw/mwworld/scene.cpp
+++ b/apps/openmw/mwworld/scene.cpp
@@ -86,7 +86,11 @@ namespace MWWorld
             }
 
             if (!((*iter)->cell->data.flags & ESM::Cell::Interior))
-                mPhysics->removeHeightField( (*iter)->cell->data.gridX, (*iter)->cell->data.gridY );
+            {
+                ESM::Land* land = mWorld->getStore().lands.search((*iter)->cell->data.gridX,(*iter)->cell->data.gridY);
+                if (land)
+                    mPhysics->removeHeightField( (*iter)->cell->data.gridX, (*iter)->cell->data.gridY );
+            }
         }
 
 		mRendering.removeCell(*iter);
@@ -122,9 +126,10 @@ namespace MWWorld
             if (!(cell->cell->data.flags & ESM::Cell::Interior))
             {
                 ESM::Land* land = mWorld->getStore().lands.search(cell->cell->data.gridX,cell->cell->data.gridY);
-                mPhysics->addHeightField (land->landData->heights,
-                    cell->cell->data.gridX, cell->cell->data.gridY,
-                    0, ( worldsize/(verts-1) ), verts);
+                if (land)
+                    mPhysics->addHeightField (land->landData->heights,
+                        cell->cell->data.gridX, cell->cell->data.gridY,
+                        0, ( worldsize/(verts-1) ), verts);
             }
 
             mRendering.configureAmbient(*cell);
@@ -255,6 +260,9 @@ namespace MWWorld
     void Scene::changeToInteriorCell (const std::string& cellName, const ESM::Position& position)
     {
         std::cout << "Changing to interior\n";
+
+        Ptr::CellStore *cell = mWorld->getInterior(cellName);
+
         // remove active
         CellStoreCollection::iterator active = mActiveCells.begin();
 
@@ -265,11 +273,9 @@ namespace MWWorld
 
         // Load cell.
         std::cout << "cellName:" << cellName << std::endl;
-        Ptr::CellStore *cell = mWorld->getInterior(cellName);
 
         loadCell (cell);
 
-
         // adjust player
         mCurrentCell = cell;
         playerCellChange (cell, position);
diff --git a/apps/openmw/mwworld/weather.cpp b/apps/openmw/mwworld/weather.cpp
index bcbb96eecf..316463f539 100644
--- a/apps/openmw/mwworld/weather.cpp
+++ b/apps/openmw/mwworld/weather.cpp
@@ -499,51 +499,54 @@ void WeatherManager::update(float duration)
             mCurrentRegion = regionstr;
             mWeatherUpdateTime = WeatherGlobals::mWeatherUpdateTime*3600;
 
-            std::string weather;
+            std::string weather = "clear";
 
             if (mRegionOverrides.find(regionstr) != mRegionOverrides.end())
                 weather = mRegionOverrides[regionstr];
             else
             {
                 // get weather probabilities for the current region
-                const ESM::Region *region = MWBase::Environment::get().getWorld()->getStore().regions.find (regionstr);
+                const ESM::Region *region = MWBase::Environment::get().getWorld()->getStore().regions.search (regionstr);
 
-                float clear = region->data.clear/255.f;
-                float cloudy = region->data.cloudy/255.f;
-                float foggy = region->data.foggy/255.f;
-                float overcast = region->data.overcast/255.f;
-                float rain = region->data.rain/255.f;
-                float thunder = region->data.thunder/255.f;
-                float ash = region->data.ash/255.f;
-                float blight = region->data.blight/255.f;
-                //float snow = region->data.a/255.f;
-                //float blizzard = region->data.b/255.f;
+                if (region != 0)
+                {
+                    float clear = region->data.clear/255.f;
+                    float cloudy = region->data.cloudy/255.f;
+                    float foggy = region->data.foggy/255.f;
+                    float overcast = region->data.overcast/255.f;
+                    float rain = region->data.rain/255.f;
+                    float thunder = region->data.thunder/255.f;
+                    float ash = region->data.ash/255.f;
+                    float blight = region->data.blight/255.f;
+                    //float snow = region->data.a/255.f;
+                    //float blizzard = region->data.b/255.f;
 
-                // re-scale to 100 percent
-                const float total = clear+cloudy+foggy+overcast+rain+thunder+ash+blight;//+snow+blizzard;
+                    // re-scale to 100 percent
+                    const float total = clear+cloudy+foggy+overcast+rain+thunder+ash+blight;//+snow+blizzard;
 
-                float random = ((rand()%100)/100.f) * total;
+                    float random = ((rand()%100)/100.f) * total;
 
-                //if (random >= snow+blight+ash+thunder+rain+overcast+foggy+cloudy+clear)
-                //    weather = "blizzard";
-                //else if (random >= blight+ash+thunder+rain+overcast+foggy+cloudy+clear)
-                //    weather = "snow";
-                /*else*/ if (random >= ash+thunder+rain+overcast+foggy+cloudy+clear)
-                    weather = "blight";
-                else if (random >= thunder+rain+overcast+foggy+cloudy+clear)
-                    weather = "ashstorm";
-                else if (random >= rain+overcast+foggy+cloudy+clear)
-                    weather = "thunderstorm";
-                else if (random >= overcast+foggy+cloudy+clear)
-                    weather = "rain";
-                else if (random >= foggy+cloudy+clear)
-                    weather = "overcast";
-                else if (random >= cloudy+clear)
-                    weather = "foggy";
-                else if (random >= clear)
-                    weather = "cloudy";
-                else
-                    weather = "clear";
+                    //if (random >= snow+blight+ash+thunder+rain+overcast+foggy+cloudy+clear)
+                    //    weather = "blizzard";
+                    //else if (random >= blight+ash+thunder+rain+overcast+foggy+cloudy+clear)
+                    //    weather = "snow";
+                    /*else*/ if (random >= ash+thunder+rain+overcast+foggy+cloudy+clear)
+                        weather = "blight";
+                    else if (random >= thunder+rain+overcast+foggy+cloudy+clear)
+                        weather = "ashstorm";
+                    else if (random >= rain+overcast+foggy+cloudy+clear)
+                        weather = "thunderstorm";
+                    else if (random >= overcast+foggy+cloudy+clear)
+                        weather = "rain";
+                    else if (random >= foggy+cloudy+clear)
+                        weather = "overcast";
+                    else if (random >= cloudy+clear)
+                        weather = "foggy";
+                    else if (random >= clear)
+                        weather = "cloudy";
+                    else
+                        weather = "clear";
+                }
             }
 
             setWeather(weather, false);