diff --git a/src/commonMain/kotlin/com/github/awcz/torch/SpecialEvent.kt b/src/commonMain/kotlin/com/github/awcz/torch/SpecialEvent.kt
index e6b9154..6edc9a1 100644
--- a/src/commonMain/kotlin/com/github/awcz/torch/SpecialEvent.kt
+++ b/src/commonMain/kotlin/com/github/awcz/torch/SpecialEvent.kt
@@ -1,7 +1,7 @@
 package com.github.awcz.torch
 
-enum class SpecialEvent(val probability: Double) {
-    FIRE_RAIN(0.001),
-    WATER_RAIN(0.002),
-    EARTHQUAKE(0.003)
+enum class SpecialEvent(val startProbability: Double, val sustainProbability: Double) {
+    FIRE_RAIN(0.008, 0.05),
+    WATER_RAIN(0.002, 0.05),
+    EARTHQUAKE(0.003, 0.05)
 }
\ No newline at end of file
diff --git a/src/commonMain/kotlin/com/github/awcz/torch/scene/GameScene.kt b/src/commonMain/kotlin/com/github/awcz/torch/scene/GameScene.kt
index c41e14e..2c73f07 100644
--- a/src/commonMain/kotlin/com/github/awcz/torch/scene/GameScene.kt
+++ b/src/commonMain/kotlin/com/github/awcz/torch/scene/GameScene.kt
@@ -336,10 +336,10 @@ class GameScene : Scene() {
         specialEvents.filter { it.value <= 0 }.forEach {
             specialEvents.remove(it.key)
         }
-        if (!specialEvents.contains(SpecialEvent.FIRE_RAIN) && Random.nextFloat() < SpecialEvent.FIRE_RAIN.probability) {
+        if (!specialEvents.contains(SpecialEvent.FIRE_RAIN) && Random.nextFloat() < SpecialEvent.FIRE_RAIN.startProbability) {
             specialEvents[SpecialEvent.FIRE_RAIN] = 400
         }
-        if (!specialEvents.contains(SpecialEvent.WATER_RAIN) && Random.nextFloat() < SpecialEvent.WATER_RAIN.probability) {
+        if (!specialEvents.contains(SpecialEvent.WATER_RAIN) && Random.nextFloat() < SpecialEvent.WATER_RAIN.startProbability) {
             specialEvents[SpecialEvent.WATER_RAIN] = 200
         }
     }
@@ -449,7 +449,11 @@ class GameScene : Scene() {
 
     private fun registerNewCollisions() {
         val fireRainProbability =
-            if (specialEvents.containsKey(SpecialEvent.FIRE_RAIN)) 0.05 else 0.008 // todo associate probability with events
+            if (specialEvents.containsKey(SpecialEvent.FIRE_RAIN)) {
+                SpecialEvent.FIRE_RAIN.sustainProbability
+            } else {
+                SpecialEvent.FIRE_RAIN.startProbability
+            }
         if (Random.nextFloat() < fireRainProbability) {
             CollisionObject(
                 mapView,