They dont have alternate sources of heat now. 80% comes from national grid. When that fails in midwinter, folks die. Says Grok: Based on the most recent avail

They dont have alternate sources of heat now. 80% comes from national grid. When that fails in midwinter, folks die. Says Grok: Based on the most recent available data and Helen’s stated plans, here’s an estimate of Helsinki’s current energy sources as of April 7, 2025, expressed in approximate percentages: Nuclear Power: Around 30-35%. Helen relies heavily on nuclear energy procured from external sources like the Olkiluoto power plant. Nuclear power forms a significant part of Finland’s electricity mix (38.1% nationally in 2024), and Helsinki’s supply reflects this stable, carbon-free source. Wind Power: Approximately 20-25%. Wind has surged in Finland, contributing 23.9% to national electricity in 2024, and Helen has emphasized replacing coal with wind energy. Helsinki benefits from this growing capacity through purchases and partnerships. Hydropower: Roughly 15-20%. Hydropower, contributing 16.6% nationally in 2024, is another key source for Helen, sourced from rivers like Kemijoki and Kymijoki outside Helsinki. Biofuels and Biomass: About 15-20%. Wood-based fuels and biomass are critical for district heating, which serves over 90% of Helsinki’s homes. In 2017, wood and residues made up 30% of district heating nationally, and Helsinki continues to use these renewable sources, though exact local percentages have shifted with coal’s exit.