As Cop31 opens in Antalya, the Guardian reports the World Meteorological Organization's finding that heat is accumulating in Earth's systems at an accelerating rate, with 2026 surface temperatures about 1.47C above preindustrial levels, record ocean heat, and CO2 up 53% since 1750. António Guterres calls it a new age of climate extremes, and Bill McGuire warns the world will pass 1.5C permanently in 2028.