Heat Warnings in United States
Heat 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 heatwaves 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 heat warnings
Heat warnings are issued when forecast temperature, humidity and night-time minimums are expected to put strain on the human body, especially for older people, infants and outdoor workers. Many countries use a multi-day heat health warning system that accounts for acclimatisation rather than a single temperature threshold.
Who issues heat 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
- Shift physical work to the early morning.
- Drink water regularly before you feel thirsty.
- Check on older neighbours, and never leave children or animals in a parked car.
Where the data comes from
Waarning reads public, key-free sources for United States: Open-Meteo, national meteorological services, national public health institutes, Copernicus. 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 heat 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 heat warnings for United States?
Yes. The dashboard loads the current values for Washington, D.C. from Open-Meteo, national meteorological services, national public health institutes, Copernicus. You can open it with one click and the location is already set.
More warnings for United States
- Severe Weather Warnings
- Flood Warnings
- Cold and Snow Warnings
- Drought Warnings
- Wildfire Warnings
- Air Quality Warnings
Heat Warnings in nearby countries
Generated 2026-10-18. Waarning is not an official warning service; in an emergency follow local authorities and emergency services.