Heat Index for the Brazilian Semiarid, annual means for 2025

Title: Heat Index rasters for the Brazilian Semiarid region: annual means 2025 Description:Pre-computed Heat Index (Rothfusz 1990) rasters for the 1,477 municipalitiesof the Brazilian Semiarid (Res. CONDEL/SUDENE 176/2024) at four synoptichours (00h, 09h, 15h, 21h local time, UTC-3). Spatial resolution: ~1 km.CRS: WGS84 (EPSG:4326). Interpolated using External Drift Kriging withaltitude (SRTM) and ERA5-Land T2m as covariates. LOOCV R² = 0.884 at 15h.Data source: 73 INMET automatic weather stations, 2025. Keywords:heat index, thermal comfort, Brazilian Semiarid, spatial interpolation,kriging, ERA5-Land, INMET, climate, public health License: CC BY 4.0