The ocean is filling with heat we cannot see, and the rate is doubling

A new Indicators of Global Climate Change report — 70-plus scientists, 56 institutions — finds human-caused warming reached 1.37°C in 2025, with the 1.5°C threshold potentially crossed within about four years at current trends. Earth's energy imbalance, the rate at which the system accumulates heat, has *doubled* in recent decades and now sits at a record. 2025 saw 65 days of global marine heatwaves. At the Bonn conference, scientists reported the planet's vital signs deteriorating "at an unprec ...