Weather above ground: rain puts out fires, fog shortens sight, storms strike with lightning

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

lang/en.lang

@@ -1712,3 +1712,14 @@ talent.none = Not learned yet.
 talent.then = Next level: {0}
 msg.talent_point = A new talent point! Spend it in the Master window.
 msg.talent_learned = {0} level {1} learned.
+
+# weather above ground
+weather.fair = Fair
+weather.rain = Rain
+weather.fog = Fog
+weather.storm = Storm
+msg.weather_clear = The sky clears up above ground.
+msg.weather_rain = It starts to rain above ground - fire will not catch.
+msg.weather_fog = Fog rolls over the land - everyone outside sees less.
+msg.weather_storm = A storm is brewing above ground! Lightning strikes units and trees.
+msg.lightning_unit = Lightning struck: {0}!