Reference Data in Heemskerk 11 indicators covering reference data for Heemskerk. IndicatorLatest Year10-yr change Rank Cooling and heating degree days - Cities and FUAs — Cooling degree 4.27 Degree days 2025 down 66.2% 1157th Cooling and heating degree days - Cities and FUAs — Change in cooling -6.62 Degree days 2025 down 482.4% 630th Cooling and heating degree days - Cities and FUAs 1,595 Degree days 2025 down 6.8% 633rd Cooling and heating degree days - Cities and FUAs — Change in heating -362.67 Degree days 2025 down 46.8% 742nd Precipitation - Cities and FUAs — Extreme precipitation days 3.5 Days per year 2024 up 366.6% 925th Precipitation - Cities and FUAs — Change in extreme precipitation 1.59 Days per year 2024 up 237.3% 557th Dependency ratio - Cities and FUAs 34.2 Percentage of population aged 15-64 years 2025 up 20.8% 359th Wind threats - Cities and FUAs — Exposure to wind threats 100 Percentage of area 2023 unchanged 1st Coastal flooding - Cities and FUAs — Built-up area exposure to 51.37 Percentage of built-up area 2022 up 2.7% 27th Internet speed - Cities and FUAs — Downloading speed 14.6 Percentage of national value 2025 up 18.7% 338th Internet speed - Cities and FUAs — Uploading speed -5.1 Percentage of national value 2025 up 83.4% 828th