The Emergency system is a fully implemented set of features as of Alpha 10.
Emergency units are units that can be called out for severe emergencies that the prison staff can't handle.
In the future, emergency units will be the only units the player can fully control, because the general prison staff will only work within the players global instructions (e.g in the deployment screen or by movement control). At the moment, however, guards can also be directly controlled.
The usage of emergency services does not cost a fee per hour, though there is a $100 charge to call them out. In future updates, an hourly charge may be applied.
Riot Police are heavily armed guards responsible for controlling and stopping riots. They arrive in squads of six and are capable of fighting multiple prisoners and prisoners with weapons.
Firemen are responsible for putting out fires in the prison.
Paramedics are responsible for treating wounded prisoners and staff in the field.
There are currently three emergency actions that can be used to control various situations in your prison.
Lockdown is a feature in the emergency access tab. Lockdown instantly closes all open doors, and instructs guards not to open them unless they're specifically moved by the player. As of Alpha 12, prisoners with stolen keys can still open doors closed via lockdown. See the lockdown section for workarounds using ""DoorModeLockedShut". It's unclear if this is buggy or intended behavior.
Bangup will send all willing prisoners immediately back to their cells, allowing for easier control of riots.
Shakedown will immediately search all prisoners and hiding spots in your prison.
There are currently 2 Emergency Events.
- Firemen have been introduced in Alpha-5. 
- Riot Police have been introduced in Alpha 10.
- Paramedics have been introduced in Alpha 10.
- Power Stations can explode, causing a massive Fire in Alpha 16.