CalHeatScore Live Data for API Use

CalHeatScore is a heat-health ranking system that translates 7-day weather forecasts into easy-to-understand heat scores ranging from 0-4 to indicate increasing levels of health risks due to extreme heat at the zip code level. This layer contains the 7-day forecast of heat scores, updated daily approximately at 5 and 8am Pacific Time. The CA GeoPortal site provides downloadable files of the data, which are updated daily at 8am. Click on this link to go directly to the CalHeatScore mapping tool

Data Definitions for the layer:

·       ZIP_CODE = Zip code identifier

·       Date = Date associated with CHS Day 0

·       CHS Day 0 =  The CalHeatScore on the day associated with the Date field

·       CHS Day 1 =  The CalHeatScore one day after the day associated with the Date field

·       CHS Day 2 =  The CalHeatScore two days after the day associated with the Date field

·       CHS Day 3 =  The CalHeatScore three days after the day associated with the Date field

·       CHS Day 4 =  The CalHeatScore four days after the day associated with the Date field

·       CHS Day 5 =  The CalHeatScore five days after the day associated with the Date field

·       CHS Day 6 =  The CalHeatScore six days after the day associated with the Date field

·       Shape_Area = Area of zip code shape

·       Shape_Length = Length of zip code shape

For more information, see the CalHeatScore mapping tool or contact [email protected].

MAP

Data and Resources

Additional Info

Field Value
Public Access Level Public
Rights No restrictions on public use
Program Contact Name felicia.chiang_oehha
Program Contact Email [email protected]
Frequency Irregular
Spatial {"type": "Polygon", "coordinates": [[[-124.4152,32.5343],[-124.4152,42.0095],[-114.1312,42.0095],[-114.1312,32.5343],[-124.4152,32.5343]]]}
Source Link https://gis.data.ca.gov/datasets/OEHHA::calheatscore-live-data-for-api-use-1
Last Updated August 16, 2026, 09:15 (UTC)
Created March 19, 2026, 09:00 (UTC)
DCAT Issued Date 2026-03-11T17:16:31.000Z
DCAT Modified Date 2026-08-15T14:43:55.480Z