The world’s oceans soaked up more heat in 2025 than ever measured, storing energy equivalent to decades of human power use. That growing heat reservoir is intensifying extreme weather and pushing climate impacts to new extremes. Credit: Shutterstock A large international research effort has found that Earth's oceans absorbed more heat in 2025 than in any year since modern measurements began. The analysis, published on January 9 in Advances in Atmospheric Sciences , shows that ocean heat storage