Vertical evacuation in a hospital means moving patients, staff, and visitors between floors, typically downward through stairwells, to escape a threat that can’t be managed by simply moving people to another wing on the same floor. It’s the more complex and less common form of hospital evacuation, reserved for situations where an entire floor or the whole building needs to be cleared.
Vertical vs. Horizontal Evacuation
Hospitals use two broad evacuation strategies. Horizontal evacuation moves patients sideways, from one section of a floor to another section behind fire doors or into an adjacent wing. This is the default approach for most emergencies because it’s faster, requires less equipment, and avoids the enormous challenge of navigating stairwells with patients who can’t walk. Fire walls and smoke compartments built into hospital design make horizontal movement effective for localized threats like a single-room fire or a hazardous spill in one department.
Vertical evacuation becomes necessary when horizontal movement isn’t enough. If fire or structural damage compromises an entire floor, if flooding is rising from below, or if the building itself is deemed unsafe after an earthquake, patients must be moved to a different level or out of the building entirely. Full-building evacuation is rare. It typically requires authorization from fire department leadership or senior hospital administration before it begins.
Who Decides to Go Vertical
The call to escalate from horizontal to vertical evacuation isn’t made by one person alone. It’s a collaborative decision involving the fire department (especially when structural safety is in question), the hospital’s incident commander or administrator on call, the nursing supervisor, the facilities or security director, and the department manager of the affected area. In situations involving bomb threats, hostage crises, or civil unrest, both fire and police leadership are involved in the decision.
This multi-person structure exists because vertical evacuation carries real risk. Moving critically ill patients down stairwells can destabilize their condition, and the process ties up enormous staff resources. The decision-makers weigh whether the threat genuinely requires full vertical movement or whether moving patients to the opposite end of the floor would be sufficient.
How Patients Are Prioritized
Hospitals generally use a reverse triage approach during evacuation. Ambulatory patients, those who can walk on their own, are moved first as a group. This clears hallways and frees staff to focus on the people who need physical assistance. Stable non-ambulatory patients go next, followed by critical care patients who may be on ventilators, IV drips, or monitoring equipment.
Within each group, patients closest to the danger are prioritized. A lead nurse guides each wave of patients toward the designated safe area. Once everyone reaches the staging area outside the building or on a safe floor, the priority order flips back to normal triage: the sickest patients get transport and continued care first.
Equipment for Stairwell Descent
The biggest logistical challenge in vertical evacuation is getting non-ambulatory patients down stairs safely. Standard hospital beds don’t fit in stairwells, and carrying a patient on a stretcher down multiple flights is physically dangerous for both the patient and the staff.
Evacuation sleds are the primary solution. These are lightweight, collapsible devices similar to a flat backboard. The patient lies flat and is secured with at least three cross-straps in a cocoon-like arrangement that keeps them stabilized during movement. The sleds include a built-in stairwell braking system that controls the speed of descent, so staff members can guide a patient down stairs without lifting. This no-lift design is critical because it means a single staff member can move even a large patient, and bariatric-sized versions are available for patients who need a wider sled. When not in use, the sleds fold into portable carry cases and can be stored on each floor.
The U.S. Department of Veterans Affairs adopted these sleds system-wide, which gives a sense of how standard this equipment has become in larger hospital systems.
Moving Critical Care Patients
Patients on life support present the hardest vertical evacuation challenge. A patient on a mechanical ventilator needs continuous airflow, oxygen, and monitoring. During evacuation, each ventilated patient ideally has a dedicated portable oxygen supply. If oxygen resources are limited, teams make allocation decisions on a case-by-case basis depending on how many patients need it and how far they need to travel.
When a patient’s oxygen levels drop during movement, the protocol is to immediately switch from the mechanical ventilator to manual bag ventilation with high-flow oxygen. Staff suction the airway to clear any blockages and watch blood pressure closely, since the physical jostling of evacuation can trigger complications like a collapsed lung. Every connection between the patient and the breathing tube must be clamped during equipment switches to prevent air loss. These patients move last in the evacuation sequence precisely because they need the most preparation and the most hands.
Tracking Patients During the Move
Losing track of a patient during evacuation is a serious risk. In a chaotic stairwell with dozens of people moving at once, a patient can end up separated from their medical records, their medications, or the staff who know their condition. Hospitals use tracking systems that range from simple paper forms to electronic tools. The Hospital Incident Command System includes a standardized form that logs each patient by triage tag number, demographics, location, and disposition as they move through the building.
Electronic systems perform better than paper in disaster settings. Wireless tools designed for mass casualty incidents allow responders to update patient locations in real time and share that data across teams. Still, patient tracking remains one of the most difficult parts of any large-scale evacuation, and no single national system has been universally adopted. Each hospital and jurisdiction tends to work with whichever system they’ve drilled with.
When Elevators Can Be Used
The traditional rule in any fire emergency is simple: don’t use elevators. But modern building codes now allow for a newer category of elevator specifically designed for evacuation use. Called Occupant Evacuation Elevators, these systems are built to remain operational during certain emergencies. When an alarm activates on a given floor, these elevators automatically dispatch to that floor and the two floors above and below it, pick up passengers, and carry them directly to the main exit level.
Digital signage at the elevator lobby tells occupants whether the elevators are available for evacuation or whether they should use the stairs instead, along with estimated wait times so people can make an informed choice. These elevators are not required by code. They’re an optional feature that building owners can install, following standards first introduced in 2013 and updated in 2019. High-rise buildings (those with an occupied floor more than 120 feet above street-level fire department access) are required to have a related but distinct system: fire service access elevators, which are reserved for firefighter use rather than occupant evacuation.
For most existing hospitals, stairwells remain the primary route for vertical evacuation. Elevator-based evacuation is largely a feature of newer construction or major renovations.