---
title: "What Is HeatRisk? Heat Stress and Hydration Glossary"
description: "HeatRisk is a National Weather Service forecast that gives a color and number for heat concern at a location, up to seven days ahead, with advice on who is most..."
url: https://jmarsolutions.multisites.ai/glossary/heatrisk
publisher: JMAR Solutions
phone: +1-214-632-7780
quote: https://jmarsolutions.multisites.ai/contact
---

Measurement

# HeatRisk

HeatRisk is a National Weather Service forecast that gives a color and number for heat concern at a location, up to seven days ahead, with advice on who is most at risk.

HeatRisk is an NWS forecast tool. It gives a color and a number that rate the heat concern for a place, and it names the groups most at risk. It runs from today through seven days ahead, so safety managers can plan for a hot week.

HeatRisk looks at how far above normal the temperatures are, the time of year, how long the heat lasts (including warm nights), and CDC heat-health thresholds. NWS notes that HeatRisk is an experimental product and is not supported 24/7. Use it with the [heat index](https://jmarsolutions.multisites.ai/glossary/heat-index) and [WBGT](https://jmarsolutions.multisites.ai/glossary/wbgt) on site. Early-season heat is a reason to review [acclimatization](https://jmarsolutions.multisites.ai/glossary/acclimatization).

[From JMAR SolutionsHydration programs and toolbox talks for crews](https://jmarsolutions.multisites.ai/hydration-programs)

## Related terms

-   [Heat index](https://jmarsolutions.multisites.ai/glossary/heat-index)
-   [WBGT](https://jmarsolutions.multisites.ai/glossary/wbgt)
-   [Acclimatization](https://jmarsolutions.multisites.ai/glossary/acclimatization)
-   [Heat stress](https://jmarsolutions.multisites.ai/glossary/heat-stress)

## Sources

1.  [NWS: Heat Forecast Tools](https://www.weather.gov/safety/heat-tools)
2.  [NWS: Heat Forecast Tools](https://www.weather.gov/safety/heat-tools)

![Ironworkers silhouetted on a steel frame against a hot orange sunset](https://jmarsolutions.multisites.ai/_astro/sunset-steel.IhAMDca0_6wk53.webp)

## See it on your crew in 15 minutes

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