When it hits
Day 30 on the Warehouse Manager's run
No warning comes first.
Starts with Mold Attack, ends with 
Rain Ends.
The same on every run: Wage Slave, Student
What comes
No zombies: this crisis is about the weather, sickness or pests, not a siege.
From the game files1
Crisis 150
| id | 150 |
|---|---|
| CrisisID | 150 |
| StartEvent | [62647] |
| EndEvent | [62648] |
| Des | Crisis_Des_150 |
| Des_Local | 霉菌 |