When it hits
From day 18 on the Warehouse Manager's run
No warning comes first.
Starts with Rat Infestation, ends with 
Rodent Problem Subsides.
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 files2
Crisis 156
| id | 156 |
|---|---|
| CrisisID | 156 |
| StartEvent | [62643] |
| EndEvent | [62658,62659] |
| Des | Crisis_Des_156 |
| Des_Local | 鼠患 |
