Skip to main content
U.S. flag

An official website of the United States government

This site is currently in beta, and your feedback is helping shape its ongoing development.

CalHeatScore Feature Layer

Published by California Office of Environmental Health Hazard Assessment | State of California | Metadata Last Checked: January 27, 2026 | Last Modified: 2024-12-20T01:05:52.000Z
CalHeatScore is a public health tool to help Californians stay informed, ready, and safe when temperatures rise. The purpose of CalHeatScore is to reduce heat-related illness and save lives by translating meteorological, weather and health data into easy-to-understand heat risk alerts. Click on this link to go directly to the CalHeatScore mapping tool. Update frequency: daily.Data Definitions:·       ZIP_CODE = Zip code identifier·       PO_NAME = Post office name·       STATE = State of zip code·       DAY_STRING = Day of forecast, including abbreviated day of week name, month, and day of month (e.g., “Mon Dec 08”)·       Category = CalHeatScore ranking (ranges from 0 to 4)·       DAY_ORDER = Order of forecast days (ranges from 0 to 6, with 0 indicating the current day), display values mirror DAY_STRING·       DAY_TEMP = National Weather Service (NWS) daily maximum heat index calculated from forecast pulled at 5am and 8am Pacific time of current day, rounded to the nearest integer·       TEMP_MAX = Record daily maximum air temperature from 1979-previous year for current calendar day (e.g., all previous December 8ths) from gridMET historical climate data·       TEMP_AVG = Average daily maximum air temperature from 1979-previous year for current calendar day (e.g., all previous December 8ths) from gridMET·       DAY_TEMP_AIR = NWS daily maximum air temperature for forecast pulled from current day·       Shape_Area = Area of zip code shape·       Shape_Length = Length of zip code shapeFor more information, see the CalHeatScore mapping tool or contact CalHeatScore@oehha.ca.gov.

data.gov

An official website of the GSA's Technology Transformation Services

Looking for U.S. government information and services?
Visit USA.gov