NWS HeatRisk is a color-numeric-based index that provides a forecast risk of heat-related impacts to occur over a 24-hour period. HeatRisk takes into consideration:

• How unusual the heat is for the time of the year.
• The duration of the heat, including both daytime and nighttime temperatures.
• If those temperatures pose an elevated risk of heat-related impacts based on data from the CDC.

We encourage you to check the HeatRisk map every day as these risk categories can change with the official forecast, which is updated at least twice a day.