Skip to main content

What to do if you hear the invacuation alarm

The process you need to follow before and after you hear the invacuation alarm.

About invacuation

Invacuation is the opposite to evacuation. You find refuge inside a building during an emergency. Invacuation may be required when there is an environmental hazard, (such as a smoke cloud or suspected chemical leak), or a security related incident.

The invacuation siren

The invacuation siren sounds different to the evacuation siren, and is instantly recognisable. When there is an invacuation emergency, the alarm will sound for 30 seconds.

What to do when you hear the siren

  1. Find the nearest building and go inside.
  2. Take immediate cover away from windows and doors, which should remain closed and locked if instructed.
  3. Find volunteers to monitor the main doors from a safe location to allow entry to other known members of staff or students.
  4. Make sure you have access to a computer screen.
  5. Keep computers and TV screens switched on for further information.
  6. Tell others about the computer message if it is obvious that they don't have access
  7. Remain in the secure area until you're given instructions by Security staff (First Responders), the Emergency Services, or the computer screen emergency messages.

Sheltering inside can be an effective way to protect yourself in some emergency situations, but you should only do so if directed by a member of the emergency services or by activation of the invacuation alarm.

The all clear

When the emergency is over a second steady tone siren will be sounded to demonstrate the all clear. This will be accompanied by an emergency message giving information about the all clear.