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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 at 5 and 8am Pacific Time. 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
01/21/26

Shapefile

DownloadZIP
01/21/26

GeoJSON

DownloadGEOJSON
01/21/26

KML

DownloadKML
01/21/26

File Geodatabase

DownloadZIP
03/06/26

Feature Collection

DownloadTXT
03/06/26

Supporting files

Data title and descriptionAccess dataFile detailsLast updated

ArcGIS Hub Dataset

HTML
03/06/26

ArcGIS GeoService

ARCGIS GEOSERVICES REST API
01/21/26

Excel

XLSX
03/06/26

GeoPackage

GPKG
03/06/26

SQLite Geodatabase

GDB
03/06/26

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