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UK temperature seen breaking June record as heatwave spreads

Temperatures could reach 38C to 40C, with officials warning of serious illness, power cuts and major disruption to travel and daily life.

  • On Monday, the Met Office issued a rare red weather warning for extreme heat across parts of England and Wales, effective 09:00 BST Wednesday June 24 to 21:00 BST Thursday June 25, forecasting daytime highs of 38–40°C.
  • A 'heat-dome' settling over western Europe is driving the surge, with human-driven climate change making extreme heat events 'more frequent in our future climate' and potentially breaking the 35.6°C June record set in 1957 and 1976.
  • The UK Health Security Agency issued a red health alert for six English regions, warning of 'population-wide adverse health effects' and 'risk to life,' while officials anticipate widespread travel delays and potential power cuts.
  • More than 40 schools across Hampshire and London announced early closures, while London North Eastern Railway urged customers not to travel Wednesday and Thursday as Network Rail warned of possible speed restrictions.
  • Authorities advise residents to stay hydrated and avoid strenuous exercise between 11am and 3pm, while Public Health Wales recommends closing curtains to keep indoor spaces cool during the record-breaking heatwave.
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Reuters broke the news in New York, United States on Monday, June 22, 2026.
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