UK Issues Rare Red Heat Alert as Temperatures Soar

Southern England is bracing for an intense heatwave, with amber health alerts issued across London, the South-East, East of England, and South West regions. Temperatures are projected to climb steadily from Friday, potentially reaching up to 38C (104F), possibly exceeding the UK's June maximum temperature record of 35.6C set in 1957 and 1976.

The Met Office has issued a rare red weather warning for Wednesday and Thursday, covering southern Wales as far west as Swansea and an area of England that includes London. The UK Health Security Agency (UKHSA) issued a red heat alert for six regions of England, indicating 'a risk to life for even the healthy population'. This is only the second time such a warning has been issued.

The heatwave is expected to bring very humid and muggy conditions, with temperatures potentially rising to 38C to 40C in some places. The Met Office warns of significant disruption to daily life, including travel, energy supplies, and potential damage to property and infrastructure. Overnight temperatures are also expected to be very high, with widespread tropical nights where the temperature does not drop below 20C across southern England.

The heatwave has prompted some schools to close early or adjust their schedules for safety reasons. Kingdown school in Warminster, Wiltshire, will finish lessons at 12:25 PM from Monday to Thursday. Other schools are relaxing uniform rules and ensuring additional water is available.

Officials have expressed concerns about water-related incidents after at least 17 people died during the May heatwave. The Met Office warns of an increase in potential water safety incidents as more people visit coastal areas, lakes or rivers.

The summer of 1976 is remembered for record heat and significant impacts on agriculture and public health. New modelling suggests that a similar heatwave could be 20% drier by the 2050s, with temperatures peaking at 45C in England, posing severe challenges to water supply.

The NHS faces increased pressure as overheating incidents surged by 53% between 2016-17 and 2023-24. The climate crisis is described as a health crisis, with urgent calls for investment in building upgrades and workforce preparedness to ensure patient safety.

A sweltering night in Cardiff has broken another new UK heat record as brutally hot conditions continue across England and Wales. Temperatures only fell to 23.5C overnight in the Welsh capital, making it the highest minimum temperature ever recorded in June. The UK’s high temperature record for June is also likely to be broken on Thursday.

The heatwave, supercharged by the climate crisis, drove the temperature to 36.1C at Gosport in Hampshire on Wednesday, beating the previous record of 35.6C set in Southampton in 1976. Heatwaves are now more severe and more likely because of carbon pollution from burning fossil fuels.

The UKHSA has extended its red heat-health alert by 24 hours to 11pm on Friday, the second red alert ever issued by the agency. The Met Office also extended its red alert for south-east England until 9pm on Friday. Rising global heat is now killing one person a minute around the world.

The UK parliament voted overwhelmingly to set a legally binding target of an 87% cut in emissions by 2040. Many schools have closed and rail journeys have been cancelled during the UK heatwave this week, which has been made even more dangerous and uncomfortable by high humidity.

Sadiq Khan, the mayor of London, launched the city’s first heat plan on Thursday. The plan includes retrofitting homes at the highest risk of overheating, more tree cover, and safe access to water for paddling and swimming. Measurements taken by Greenpeace found pavements, rail platforms, building sites and other places across London reached surface temperatures of 50C to 60C on Wednesday.