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The NWS HeatRisk Service is an experimental
color-numeric-based index that provides a forecast risk of heat-related impacts to occur over a 24-hour period. HeatRisk takes into consideration:
This index is supplementary to official NWS heat products and is meant to provide risk guidance for those decision makers and heat-sensitive populations who need to take actions at levels that may be below current NWS heat product levels.
HeatRisk Categories
Category | Risk of Heat-Related Impacts |
Green - 0 |
Little to no risk from expected heat. |
Yellow - 1 | Minor - This level of heat affects primarily those individuals extremely sensitive to heat, especially when outdoors without effective cooling and/or adequate hydration. |
Orange - 2 | Moderate - This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. Impacts possible in some health systems and in heat-sensitive industries. |
Red - 3 | Major - This level of heat affects anyone without effective cooling and/or adequate hydration. Impacts likely in some health systems, heat-sensitive industries and infrastructure. |
Magenta - 4 | Extreme - This level of rare and/or long-duration extreme heat with little to no overnight relief affects anyone without effective cooling and/or adequate hydration. Impacts likely in most health systems, heat-sensitive industries and infrastructure. |
Link to graphical web page: https://www.wpc.ncep.noaa.gov/heatrisk/
Link to data download (KML and GeoTiff): https://www.wpc.ncep.noaa.gov/heatrisk/data.html
Link to metadata
Update Frequency: Data is updated hourly (most recent data should be available at the top of hour)
Questions/Concerns about the service, please contact the DISS GIS team
Time Information: This service is time enabled
The NWS HeatRisk Service is an experimental
color-numeric-based index that provides a forecast risk of heat-related impacts to occur over a 24-hour period. HeatRisk takes into consideration:
This index is supplementary to official NWS heat products and is meant to provide risk guidance for those decision makers and heat-sensitive populations who need to take actions at levels that may be below current NWS heat product levels.
HeatRisk Categories
Category | Risk of Heat-Related Impacts |
Green - 0 |
Little to no risk from expected heat. |
Yellow - 1 | Minor - This level of heat affects primarily those individuals extremely sensitive to heat, especially when outdoors without effective cooling and/or adequate hydration. |
Orange - 2 | Moderate - This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. Impacts possible in some health systems and in heat-sensitive industries. |
Red - 3 | Major - This level of heat affects anyone without effective cooling and/or adequate hydration. Impacts likely in some health systems, heat-sensitive industries and infrastructure. |
Magenta - 4 | Extreme - This level of rare and/or long-duration extreme heat with little to no overnight relief affects anyone without effective cooling and/or adequate hydration. Impacts likely in most health systems, heat-sensitive industries and infrastructure. |
Link to graphical web page: https://www.wpc.ncep.noaa.gov/heatrisk/
Link to data download (KML and GeoTiff): https://www.wpc.ncep.noaa.gov/heatrisk/data.html
Link to metadata
Update Frequency: Data is updated hourly (most recent data should be available at the top of hour)
Questions/Concerns about the service, please contact the DISS GIS team
Time Information: This service is time enabled