A new study published in the International Journal of Climatology has found that 2025 was the hottest year in the UK since records began in 1884, with the last four years all ranking among the five warmest ever. The report warns that what were once considered extreme weather events — including intense heatwaves, heavy rainfall, and prolonged droughts — are rapidly becoming routine, driven by carbon emissions warming the atmosphere. The findings come as the UK endures its third deadly heatwave in two months, with scientists noting that the number of days above 30°C in London has more than quadrupled compared to the 1961–1990 baseline, and that roughly 2,700 people in England and Wales are estimated to have died during heatwaves in May and June alone.