An all-hazards approach is a planning strategy that prepares for the common consequences of disasters rather than building separate plans for every possible threat. Instead of creating one plan for hurricanes, another for chemical spills, and another for active shooters, organizations develop a flexible core plan that works across all emergencies, then add specific annexes for individual threats as needed. It’s the dominant philosophy in emergency management at every level, from federal agencies to local schools and hospitals.
How It Differs From Single-Hazard Planning
Before the all-hazards concept took hold, emergency planning was largely event-specific. Agencies built plans around particular disasters: one for earthquakes, one for nuclear incidents, one for floods. The problem was obvious. Most disasters create the same basic needs: communication, evacuation, shelter, medical care, supply chains, and coordination among agencies. Building separate plans for each scenario meant duplicating effort, fragmenting resources, and leaving gaps when something unexpected happened.
The shift began in the late 1980s. A 1987 federal plan for catastrophic earthquake response, developed by a FEMA regional committee in San Francisco, introduced a new concept: planning for the consequences of a disaster rather than the disaster itself. That structure was integrated into the Federal Response Plan (FRP) in the early 1990s, creating a single coordinated framework for federal disaster response. Not everyone was on board initially. Some traditional FEMA program offices called the FRP a “doomsday plan” and considered it over-engineered. But the logic won out, and the all-hazards philosophy became the backbone of the National Preparedness System.
The Core Idea: Plan for Consequences, Not Causes
A tornado and a terrorist bombing produce different kinds of damage, but the immediate needs they create overlap heavily. Both require first responders, triage, evacuation routes, communication systems, and supply logistics. An all-hazards approach builds strong capabilities around those shared needs first, then layers on threat-specific details where they matter.
In practice, this means an organization conducts a risk and vulnerability assessment to identify which threats are most relevant to its location and circumstances, then develops a general emergency operations plan covering the universal elements of response. Threat-specific annexes handle the details unique to particular scenarios, like sheltering protocols for a chemical release versus a severe storm. The National Preparedness System encourages agencies to use insight from state, local, and federal partners to shape those annexes.
The Four Phases of Emergency Management
The all-hazards approach applies across the full emergency management cycle, not just response. That cycle has four phases:
- Mitigation reduces the impact of disasters before they happen. This includes things like building codes, flood barriers, backup power systems, and business continuity plans. Hospitals, for instance, develop 96-hour continuity plans covering utilities, communications, food, water, medication, staffing, and medical supplies for scenarios where the surrounding community can’t support normal operations. Strategies focused on predisaster mitigation tend to be significantly less expensive than those built entirely around post-disaster response.
- Preparedness is a continuous cycle of planning, training, equipping, exercising, and evaluating. This is where organizations identify risks through tools like a Hazard Vulnerability Analysis and build the capabilities needed to act on their plans. FEMA’s Threat and Hazard Identification and Risk Assessment (THIRA) is a three-step process, completed every three years, that helps communities pinpoint their greatest risks and determine what capabilities they need.
- Response is the activation phase: mobilizing emergency staff, coordinating across agencies, and managing the immediate crisis. Response plans are kept deliberately flexible because staffing and conditions vary depending on when and where an incident occurs.
- Recovery focuses on restoring the affected area to its previous state. This covers rebuilding damaged property, repairing infrastructure, restoring employment, and reopening essential services.
How the Incident Command System Fits In
One of the most visible tools of the all-hazards approach is the Incident Command System (ICS), a standardized structure for command, control, and coordination during any type of incident. ICS provides a common hierarchy so that personnel from different organizations can work together effectively, whether the event is a marathon, a disease outbreak, or a natural disaster.
The system scales from a single department up to city, state, and federal levels. It has been used to coordinate responses to mass gatherings like the Chicago Marathon, disease outbreaks including Ebola, Zika, SARS in Taiwan, and H1N1 influenza in Mexico, and was widely adopted during the COVID-19 pandemic. The same organizational framework applies regardless of the hazard, which is exactly the point.
Public Health and International Applications
Public health agencies use the same philosophy. In 2011, the CDC established 15 capabilities as national standards for public health preparedness planning, covering state, local, tribal, and territorial programs. These were updated in 2019 to reflect lessons learned over the previous decade. The capabilities span pandemic influenza, environmental health, at-risk populations, and tribal communities, all under a single preparedness framework rather than disease-by-disease plans.
Internationally, the approach has similar standing. The Sendai Framework for Disaster Risk Reduction, adopted by the UN General Assembly in 2015, calls for preventing new disaster risk and reducing existing risk through an all-of-society engagement. It addresses three dimensions: exposure to hazards, vulnerability and capacity, and hazard characteristics. The framework’s emphasis on reducing risk across all threat types, rather than preparing for individual disasters in isolation, mirrors the all-hazards philosophy.
What It Looks Like for Organizations
For businesses, schools, and hospitals, an all-hazards approach typically means building two layers of planning. The first is an emergency plan that tells people what to do immediately before or during a crisis. The second is a business continuity plan, which is a separate document focused on minimizing disruption and returning to normal operations regardless of what caused the interruption.
A business continuity plan under an all-hazards framework typically covers important contacts, essential functions, a business impact analysis, specialized supplies and equipment, essential vendors, vital documents, data storage, minimum site requirements, alternate site information, and recovery planning. The key insight is that these elements matter whether the disruption is a cyberattack, a fire, a pandemic, or a power grid failure. You plan for the disruption itself, not just the cause.
Limitations of the Approach
The all-hazards approach is not without criticism. Some emergency management researchers argue it can create a false sense of preparedness by emphasizing general capabilities at the expense of deep expertise in the most likely threats. A competing concept called the “top hazards approach” focuses resources on the specific hazards a community is most likely to face, rather than spreading preparedness across all possible scenarios.
Supporters of the all-hazards framework counter that it consolidates resources, prevents waste, allows costs to be shared, and encourages cooperation between public, private, government, and nonprofit stakeholders. Critics acknowledge these benefits but point out that some hazards, like pandemics or radiological incidents, have unique requirements that generic planning simply can’t cover. In practice, most effective emergency management programs use the all-hazards framework as a foundation and build hazard-specific annexes on top of it, combining the efficiency of general planning with the depth of targeted preparation.