Another Heatwave in Four Weeks: How Back-to-Back Extremes Reshape Britain's Heat Risk

The Met Office forecasts a week-long heatwave peaking at 34°C across southern England and Wales from 9–10 July, less than a month after the UK recorded 37.7°C in Norfolk—a new June record. Sustained heat over seven days accumulates physiological stress in vulnerable populations even below peak temperatures. This pattern mirrors climate models: once-rare events now occur regularly, testing infrastructure and health systems built for cooler baselines.