Third Heatwave Declared With 35C Peak Forecast
The UK formally entered its third heatwave of the summer, with temperatures building towards a possible 35C in the South East on Friday or Saturday, London expected to reach 34C, and forecasters warning of “tropical nights” that stay above 20C. As many as ten consecutive days above 30C are possible. Amber heat-health alerts activate at 9am tomorrow across six regions, with yellow alerts covering the north.
The declaration formalises what the week’s forecasting has pointed to, and raises June’s benchmark question: whether this spell’s duration does more damage than its predecessor’s intensity. Tropical nights are the quiet killer in the statistics — bodies that cannot cool overnight accumulate strain, which is why the amber alerts’ five-day span matters more than any single afternoon’s peak. Water stress compounds daily: two hosepipe bans are live or imminent and river levels keep falling. The NHS enters the peak already carrying June’s deferred demand. Watch Friday’s peak temperature against the 35C forecast, and admissions data as the amber window opens.