Invacuation Procedure: What It Is and When to Use It

As part of a school or academy’s Health and Safety policies and procedures, this document outlines the response plan for Critical Incidents.

Schools and academy’s must recognise that, as part of its emergency procedures, a clear plan is necessary to address and manage threats to students and staff that may occur within the building or on the grounds.

An invacuation is a safety protocol used to protect people inside a building when a threat exists outside. It differs from an evacuation, which is triggered by internal dangers (e.g., fire). Invacuation ensures people remain indoors and the premises are secured until the external risk has passed.

When to Use Invacuation

Invacuation may be triggered by threats in the local area, such as:

• Chemical spill or hazardous material incident nearby;

• Violent incident or public disorder in the vicinity; and

• Potential intruder or external security threat.

Sometimes invacuation is a temporary measure—it may later transition to a full evacuation if circumstances change.

Tailoring for Specific Threats

• Chemical incident – turn off or seal ventilation systems where necessary; and

• Security threat – prioritise safe areas with good protection and minimal external visibility.

Elements of an Invacuation Procedure

1. Securing the Building

• Lock all doors, windows, and entry points immediately; and

• Prevent anyone from entering or leaving until the all-clear is given.

2. Moving to Safe Internal Areas

• Relocate people to designated safe zones within the building (as advised by the National Protective Security Authority); and

• Prioritise areas away from external doors and windows.

3. Communication

• Provide clear, timely instructions to staff and students;

• Explain the situation appropriately and outline required actions; and

• Use internal systems (PA, text alerts, messaging platforms) to deliver updates.

4. Integration with Lockdown Procedures

Invacuation is often combined with lockdown measures, which may include:

• Locking internal doors;

• Restricting movement inside the building; and

• Taking additional precautions depending on the threat level

5. Roll Call and Welfare Checks

Once indoors and secured

• Conduct a roll call to confirm everyone is accounted for; and

• Check for injuries or anyone needing assistance.

6. Ongoing Monitoring

• Instruct staff and students to monitor phones, intercoms, or email for updates; and

• Follow any further instructions from emergency services or senior management.

Summary

Invacuation is a critical safety measure for managing external threats. By securing the site, moving people to safe areas, maintaining communication, and integrating with lockdown procedures, organisations can protect staff and students until it is safe to resume normal operations.

HANDSAM RESOURCES:

F16 Emergency Evacuation, Invacuation and Drill Record

S15 Invacuation Procedure