United States Geological Survey (US Department of the Interior)
Scientific Information on Earthquakes, Volcanoes and more...
The Environmental Protection Agency (EPA)
Information on Hazardous Materials and more...
National Institute for Occupational Safety and Health (NIOSH)
Emergency Preparedness for Business, Chemical Safety, Gas Masks and more...
US Fire Administration has 8 on-line courses including Emergency Response to Terrorism. View the entire course list at their website.