Radiation Warnings in United States

Radiation Warnings for United States (Northern America) come from National Weather Service (NWS), Federal Emergency Management Agency (FEMA), USGS Earthquake Hazards Program, National Tsunami Warning Center (NOAA). This page explains what these warnings mean, which authority publishes them, and how to check the current status for Washington, D.C..

Check live nuclear status for Washington, D.C.Browse all warnings

At a glance

countryUnited States · North America
reference cityWashington, D.C. (38.9, -77.04)
emergencyPrimary emergency number911
risk profilestorm, flood, heat, cold, drought, wildfire, air, earthquake, volcano, tsunami, radiation

What counts as a radiation warnings

Radiation warnings are issued by nuclear regulators and civil protection after a release of radioactive material, or as a precaution around a nuclear facility. Protective measures are specific and ordered: sheltering, closing ventilation, taking stable iodine only when instructed, and avoiding contaminated food and water.

Who issues radiation warnings in United States

meteoNational Weather Service (NWS)
civilFederal Emergency Management Agency (FEMA)
seismicUSGS Earthquake Hazards Program
marineNational Tsunami Warning Center (NOAA)

Warning levels, colours and terminology are set nationally. Always read the warning text of the issuing authority: it names the affected districts, the expected time window and the recommended action.

If a warning is active in United States

Shelter indoors, close windows and switch off ventilation until told otherwise.
Take stable iodine only on official instruction - never on your own.
Do not consume fresh local produce, milk or rainwater until cleared.

Where the data comes from

Waarning reads public, key-free sources for United States: IAEA, national nuclear regulators, civil protection agencies, CTBTO. Measurements and official warnings are shown separately, and official warnings always keep the name of the authority that issued them.

Frequently asked questions

Who issues radiation warnings in United States?

National Weather Service (NWS), Federal Emergency Management Agency (FEMA), USGS Earthquake Hazards Program, National Tsunami Warning Center (NOAA). Waarning does not issue warnings; it aggregates the public feeds of these bodies and links back to the original source.

What is the emergency number in United States?

The primary emergency number is 911. Use it for a life-threatening situation; for non-urgent reports use the local police station number.

Does Waarning show live radiation warnings for United States?

Yes. The dashboard loads the current values for Washington, D.C. from IAEA, national nuclear regulators, civil protection agencies, CTBTO. You can open it with one click and the location is already set.

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Radiation Warnings in nearby countries

Generated 2026-10-18. Waarning is not an official warning service; in an emergency follow local authorities and emergency services.