This dataset contains the risk component of the dairy-sector heatwave assessment for Aydın Province, Türkiye, developed under the CLIMAAX project. The dataset quantifies the impact of projected heat stress (Temperature–Humidity Index, THI) on: Fertility loss (%) Milk production loss (liters) Economic loss (local currency) Cooling-related electricity costs File: Fertility_Loss_daily_ensemble_district_level.xlsx Daily fertility loss (%) District-level aggregation Ensemble median values Historical period (1976–2005) Future projections: RCP4.5 (2041–2070) RCP8.5 (2041–2070) File: HSDD_milk_and_economical_loss_ensemble_district_level.xlsx Contains yearly aggregated results including: Heat Stress Degree Days (HSDD) Milk production loss (liters) Economic loss (TL or EUR) Cooling electricity cost Results per district Ensemble statistics Historical period (1976–2005) Future projections: RCP4.5 (2041–2070) RCP8.5 (2041–2070) File: Plots.zip District-level maps of: HSDD Fertility loss (%) Milk loss Economic loss Cooling electricity cost Historical vs future periods Reproducible Risk Assessment Workflow File: 01_Heatwave_Risk_Assessment.ipynb Contains the full modelling workflow used to generate the risk results, including: Processing of THI hazard outputs Calculation of HSDD Fertility loss computation Milk production loss estimation Economic loss calculation District-level aggregation Ensemble statistics Visualisation procedures