In the framework of theNational Response Framework (NRF)and theNational Infrastructure Protection Plan (NIPP), theEnergy and Information Technology (IT)sectors are identified as the most critical "enabling" sectors. These two sectors are characterized by their deep "interdependency," meaning that almost every other critical infrastructure sector—including Water, Transportation, and Healthcare—relies on them to function. This concept is often referred to as "cascading failure" risk: if the Energy or IT sector fails, the operational continuity of all other sectors is immediately compromised.
TheEnergy Sectorprovides the "fuel" for the nation's economy and life-safety systems. Without electricity or liquid fuels, water pumps stop, hospitals revert to limited battery power, and communication towers fail. Similarly, theIT Sectorprovides the "brains" of modern infrastructure. Most critical infrastructure now relies on Industrial Control Systems (ICS) and Supervisory Control and Data Acquisition (SCADA) systems that are managed via IT networks. The NRF highlights that a cyber-attack on the IT sector can "blind" the Energy sector, just as a power outage can "silence" the IT sector.
According to theCEDPbody of knowledge, understanding these dependencies is the key toBusiness Continuity Planning (BCP). Emergency managers must realize that their "internal" plans are only effective if the "external" dependencies of Energy and IT remain stable. For example, a hospital's EOP might be perfect, but if the local IT provider suffers a data breach or the regional power grid collapses for an extended period, the hospital's ability to maintain electronic health records or operate laboratory equipment is lost. This is why federal resilience efforts focus heavily on "hardening" these two specific sectors. By ensuring that the "enabling" sectors are resilient, the government creates a foundation that supports the operational continuity of the entire "Whole Community" during and after a catastrophic event.