FEMA 453 Design Guidance for Shelters and Safe Rooms

in response to the manmade CBRE threats as defined in the
National Response Plan (NRP) and the National Planning Scenarios.
As published in the National Preparedness Guidance (April
2005), the Federal interagency community developed 15 planning
scenarios (the National Planning Scenarios or Scenarios)
for use in national, Federal, state, and local homeland security
preparedness activities. The National Planning Scenarios are
planning tools and are representative of the range of potential
terrorist attacks and natural disasters and the related impacts that
face our nation. The scenarios establish the range of response requirements
to facilitate preparedness planning.
The National Planning Scenarios describe the potential scope
and magnitude of plausible major events that require coordination
among various jurisdictions and levels of government and
communities.
Scenario 1: Nuclear Detonation – 10-Kiloton Improvised Nuclear
Device
Scenario 2: Biological Attack – Aerosol Anthrax
Scenario 3: Biological Disease Outbreak – Pandemic Influenza
Scenario 4: Biological Attack – Plague
Scenario 5: Chemical Attack – Blister Agent
Scenario 6: Chemical Attack – Toxic Industrial Chemicals
Scenario 7: Chemical Attack – Nerve Agent
Scenario 8: Chemical Attack – Chlorine Tank Explosion
Scenario 9: Natural Disaster – Major Earthquake
Scenario 10: Natural Disaster – Major Hurricane
Scenario 11: Radiological Attack – Radiological Dispersal Devices
Scenario 12: Explosives Attack – Bombing Using Improvised
Explosive Device
Scenario 13: Biological Attack – Food Contamination
1-2 design considerations