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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 shapeFor more information, see the CalHeatScore mapping tool or contact CalHeatScore@oehha.ca.gov.

Data files

Data title and descriptionAccess dataFile detailsLast updated

CSV

Download
CSV
03/19/26

Shapefile

DownloadZIP
03/19/26

GeoJSON

DownloadGEOJSON
03/19/26

KML

DownloadKML
03/19/26

File Geodatabase

DownloadZIP
03/19/26

Feature Collection

DownloadTXT
03/19/26

Supporting files

Data title and descriptionAccess dataFile detailsLast updated

ArcGIS Hub Dataset

HTML
03/19/26

ArcGIS GeoService

ARCGIS GEOSERVICES REST API
03/19/26

Excel

XLSX
03/19/26

GeoPackage

GPKG
03/19/26

SQLite Geodatabase

GDB
03/19/26

API endpoint

Dataset Name

Use the query web API to retrieve data with a set of basic parameters. Copy the API endpoint you need to start.

Usage documentation