Britain's weather authorities have extended the rare red extreme heat warning for London and parts of south-east England, as an intense heatwave continues to grip the country with record-breaking temperatures and significant risks to public health. The warning will remain in force until Friday evening, with forecasters predicting temperatures could approach 40°C in some areas.
The UK has already recorded its hottest June day on record, with temperatures climbing above 36°C, surpassing previous records set in 1976 and 1957. The Met Office warned that the combination of extreme heat and high humidity could place severe strain on health services, transport networks, electricity supplies and water infrastructure.
The red warning covers London, the South East, and parts of eastern England, while amber heat alerts remain in place across much of the rest of England. Officials have urged people to avoid unnecessary travel, stay hydrated, remain indoors during the hottest hours of the day, and check on elderly or vulnerable neighbours.
The extreme weather has already caused widespread disruption. More than 1,000 schools have either closed early or switched to remote learning, rail operators have introduced speed restrictions, and some services have been cancelled due to concerns over tracks buckling in the heat. Hospitals have also reported increased pressure from heat-related illnesses, while firefighters remain on high alert because of the heightened risk of wildfires.
Meteorologists expect temperatures to ease gradually over the weekend as cooler Atlantic air moves into the region, but authorities continue to warn that the ongoing heatwave poses serious risks to health and critical infrastructure.
