This article is from the Mid-Atlantic ADA Center (August, 2012).
This site from the Department of Homeland Security includes information on planning, preparation, and response for emergencies and disasters of all types.
ODEP offers information about preparedness in the workplace. The site includes a "template" entitled Preparing the Workplace for Everyone: Accounting for the Needs of People with Disabilities which was designed as a guide for planning and implementation activities for federal agencies, but which may be helpful to other types of employers as well.
Fact Sheet on Obtaining and Using Employee Medical Information as Part of Emergency Evacuation Procedures
This publication is from the U.S. Equal Employment Opportunity Commission (EEOC).
The CDC features information on preparedness for biological, chemical, and radiological threats. Information is posted in several languages.
The Red Cross coordinates relief efforts around the world, and offers information (English and Spanish) and products for preparedness.