(http://www.redcross.org) -- "Since its founding in 1881 by visionary leader Clara Barton, the American Red Cross has been the nation's premier emergency response organization."
(http://www.disasterassistance.gov) – Provides information and services to help people who are involved in natural disasters as well as terrorism and disease.
(http://www.icrc.org/eng) -- "An independent, neutral organization ensuring humanitarian protection and assistance for victims of war and other situations of violence"
(http://www.nationalgeographic.com/features/04/forcesofnature/)
Provides information and simulation of the most powerful natural disasters including hurricanes, earthquakes, volcanoes and tornados.
(http://www.nvoad.org) -- "NVOAD coordinates planning efforts by many voluntary organizations responding to disaster. ... Once disasters occur, NVOAD or an affiliated state VOAD encourages members and other voluntary agencies to convene on site."
(http://www.wmo.int/pages/index_en.html) -- This intergovernmental organization is "the specialized agency of the United Nations for meteorology (weather and climate), operational hydrology and related geophysical sciences."