U.S. Nuclear Regulatory Commission
http://www.nrc.gov
In response to nuclear emergencies, the NRC works with other U.S. agencies to monitor radioactive releases and predict their path. As of March 16, all the available information continues to indicate Hawaii, Alaska, the U.S. Territories and the U.S. West Coast are not expected to experience any harmful levels of radioactivity.
The latest NRC news releases are available through a free subscription at the following Web address:
http://www.nrc.gov/public-involve/listserver.html
U.S. Environmental Protection Agency (EPA)
http://www.epa.gov/radiation
FAQs re: Japan nuclear emergency from EPA
http://www.epa.gov/radiation/japan-faqs.html
Winds can carry radiation. But according to scientists, the explosions and leaks in Japan have stayed in the lower levels of the atmosphere. Radiation has not reached the jet stream, a fast moving river of air that usually runs between 20,000 and 40,000 feet in the atmosphere. Over the next week, National Weather Service meteorologists in Honolulu forecast the jet stream will remain away from Hawaii.
How EPA is monitoring air for radiation
http://www.epa.gov/radiation/rert/monitoring.html
World Meteorological Organization
http://www.wmo.int/pages/index_en.html
World Health Organization Japan nuclear concerns FAQs
http://www.who.int/hac/crises/jpn/faqs/en/index.html
Definitions for radiation terms
http://emergency.cdc.gov/radiation/glossary.asp
Information about Potassium Iodide (KI)
http://emergency.cdc.gov/radiation/ki.asp
http://www.fda.gov/Drugs/EmergencyPreparedness/BioterrorismandDrugPreparedness/ucm072265.htm
Understanding radiation exposure
http://www.epa.gov/radiation/understand/perspective.html
Talking to children about the disaster in Japan
http://www.cincinnatichildrens.org/
UH College of Tropical Agriculture Publication on Radiation
http://www.ctahr.hawaii.edu/site/Info.aspx
U.S. Department of State, Embassies and Consulates
http://travel.state.gov/travel/cis_pa_tw/cis/cis_1148.html
Travel to Japan
http://www.jnto.go.jp/eq/