Homeland Security Advisory System

Threat Conditions and Associated Protective Measures | For More Information
Helpful Websites | Useful Telephone Numbers

The Homeland Security Advisory System was designed to provide a comprehensive means to disseminate information regarding the risk of terrorist acts to federal, state, and local authorities and to the American people. This system provides warnings in the form of a set of graduated "Threat Conditions" that increase as the risk of the threat increases. At each threat condition, federal departments and agencies would implement a corresponding set of "Protective Measures" to further reduce vulnerability or increase response capability during a period of heightened alert.

Although the Homeland Security Advisory System is binding on the executive branch, it is voluntary to other levels of government and the private sector. There are five threat conditions, each identified by a description and corresponding color. The greater the risk of a terrorist attack, the higher the threat condition. Risk includes both the probability of an attack occurring and its potential gravity. Threat conditions are assigned by the Attorney General in consultation with the Assistant to the President for Homeland Security. Threat conditions may be assigned for the entire nation, or they may be set for a particular geographic area or industrial sector. Assigned threat conditions will be reviewed at regular intervals to determine whether adjustments are warranted.

 Threat Conditions and Associated Protective Measures

There is always a risk of a terrorist threat. Each threat condition assigns a level of alert appropriate to the increasing risk of terrorist attacks. Beneath each threat condition are some suggested protective measures that the government and the public can take, recognizing that the heads of federal departments and agencies are responsible for developing and implementing appropriate agency-specific Protective Measures:

Low Condition (Green). This condition is declared when there is a low risk of terrorist attacks. Federal departments and agencies will consider the following protective measures.

  • Refine and exercise prearranged protective measures;
  • Ensure personnel receive proper training on the Homeland Security Advisory System and specific prearranged department or agency protective measures; and
  • Institute a process to assure that all facilities and regulated sectors are regularly assessed for vulnerabilities to terrorist attacks, and all reasonable measures are taken to mitigate these vulnerabilities.
Members of the public can: Guarded Condition (Blue). This condition is declared when there is a general risk of terrorist attacks. In addition to the measures taken in the previous threat condition, federal departments and agencies will consider the following protective measures:
  • Check communications with designated emergency response or command locations;
  • Review and update emergency response procedures; and
  • Provide the public with any information that would strengthen its ability to act appropriately.
Members of the public, in addition to the actions taken for the previous threat condition, can:
  • Update their disaster supply kit;
  • Review their household disaster plan;
  • Hold a household meeting to discuss what members would do and how they would communicate in the event of an incident;
  • Develop a more detailed household communication plan;
  • Apartment residents should discuss with building managers steps to be taken during an emergency; and
  • People with special needs should discuss their emergency plans with friends, family or employers.
Elevated Condition (Yellow). An Elevated Condition is declared when there is a significant risk of terrorist attacks. In addition to the measures taken in the previous threat conditions, federal departments and agencies will consider the following protective measures:
  • Increase surveillance of critical locations;
  • Coordinate emergency plans with nearby jurisdictions as appropriate;
  • Assess whether the precise characteristics of the threat require the further refinement of prearranged protective measures; and
  • Implement, as appropriate, contingency and emergency response plans.
Members of the public, in addition to the actions taken for the previous threat condition, can:
  • Be observant of any suspicious activity and report it to authorities;
  • Contact neighbors to discuss their plans and needs;
  • Check with school officials to determine their plans for an emergency and procedures to reunite children with parents and caregivers; and
  • Update the household communication plan.
High Condition (Orange). A High Condition is declared when there is a high risk of terrorist attacks. In addition to the measures taken in the previous threat conditions, federal departments and agencies will consider the following protective measures:
  • Coordinate necessary security efforts with federal, state, and local law enforcement agencies, National Guard or other security and armed forces;
  • Take additional precautions at public events, possibly considering alternative venues or even cancellation;
  • Prepare to execute contingency procedures, such as moving to an alternate site or dispersing the workforce; and
  • Restrict access to a threatened facility to essential personnel only.
Members of the public, in addition to the actions taken for the previous threat conditions, can:
  • Review preparedness measures (including evacuation and sheltering) for potential terrorist actions including chemical, biological, and radiological attacks;
  • Avoid high profile or symbolic locations; and
  • Exercise caution when traveling.
Severe Condition (Red). A Severe Condition reflects a severe risk of terrorist attacks. Under most circumstances, the protective measures for a Severe Condition are not intended to be sustained for substantial periods of time. In addition to the protective measures in the previous threat conditions, federal departments and agencies also will consider the following general measures:
  • Increase or redirect personnel to address critical emergency needs;
  • Assign emergency response personnel and pre-position and mobilize specially trained teams or resources;
  • Monitor, redirect, or constrain transportation systems; and
  • Close public and government facilities not critical for continuity of essential operations, especially public safety.
Members of the public, in addition to the actions taken for the previous threat conditions, can:
  • Avoid public gathering places such as sports arenas, holiday gatherings, or other high risk locations;
  • Follow official instructions about restrictions to normal activities;
  • Contact employer to determine status of work;
  • Listen to the radio and TV for possible advisories or warnings; and
  • Prepare to take protective actions such as sheltering-in-place or evacuation if instructed to do so by public officials.

For More Information

Helpful Websites

Preparing for a Disaster

  • www.Ready.gov
    Emergency preparedness guidance from the U.S. Department of Homeland Security lists and explains specific threats and response. How to prepare, glossary, feedback form, and links to related government and private organizations.

  • www.dhs.gov
    U.S. Department of Homeland Security

  • www.usa.gov
    Usa.gov - The Official Web Portal of the US Federal Government

  • www.citizencorps.gov
    Citizen Corps

Disaster Help

  • www.disasterhelp.gov
    Sponsored by the Disaster Management e-Government Initiative, providing information and services relating to the four pillars of all-hazards disaster management: preparedness, response, recovery, and migration.

  • www.fema.gov
    Federal Emergency Management Agency

  • www.redcross.org
    American Red Cross

  • www.bt.cdc.gov
    Centers for Disease Control and Prevention
    Public Health Emergency Preparedness and Response

Useful Telephone Numbers

  • 1-800-FED-INFO (1-800-333-4636)
    Call the Federal Citizen Information Center for answers you can trust about federal agencies, programs, benefits or services.

  • 1-800-BE-READY (1-800-237-3239)
    Citizens can call 1-800-BE-READY to order a readiness pamphlet and to get more information about ways to protect themselves and their families.

  • 1-866-GET-INFO (1-866-438-4636)
    American Red Cross hotline for information on personal and family disaster preparedness, international humanitarian assistance, services to the military, and answers to questions about all Red Cross services.
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Emergency Planning and Disaster Supplies | Emergency Planning | Disaster Supply Kits | Evacuation
Shelter | National Security Emergencies | Terrorism | Chemical and Biological Weapons
Nuclear and Radiological Attack | Homeland Security Advisory System | For More Information
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