Met Office issues amber heat warnings as temperatures set to hit 38C
The UK faces an unprecedented heatwave driven by a high-pressure heat dome, prompting urgent health alerts and warnings of potential infrastructure failure.
The Met Office has issued a series of urgent weather warnings as the United Kingdom faces an intense heatwave, with temperatures projected to hit 38C and potentially climb toward 40C. Forecasters have escalated the threat level, issuing rare red extreme heat warnings for parts of central and southern England and south-east Wales. This follows three consecutive days of red alerts, a milestone without precedent in the history of the current warning system. The red warnings are active from Wednesday, 24 June 2026, through Thursday, 25 June 2026.
The sweltering conditions are driven by a "heat dome," an area of high pressure trapping warm air over the UK. This atmospheric phenomenon creates an oppressive combination of high daytime temperatures and significant humidity. Met Office deputy chief forecaster Tom Crabtree noted that the event is developing into a severe, impactful weather event, as the persistence of the heat — including "tropical nights" where temperatures remain above 20C — prevents individuals from recovering from daytime heat stress.
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Impact on Health and Infrastructure
The UK Health Security Agency (UKHSA) has issued red and amber heat-health alerts, cautioning that the impact will not be limited to the vulnerable. Officials warn that even healthy individuals face risks as the heat stretches the capacity of public health and social care services. The UKHSA has explicitly noted that a rise in deaths is likely, particularly among those aged 65 and over or those with underlying health conditions. Internal temperatures in hospitals and care homes could also exceed recommended thresholds for clinical risk assessment, complicating the work of staff tasked with delivering services.
Infrastructure is under significant strain. The Met Office has warned of potential failures in heat-sensitive equipment, raising the risk of power cuts and the loss of essential services, including water, gas, and mobile phone connectivity. Transport networks face disruption, with potential rail cancellations, flight delays, and road issues. Car breakdown services have also reported an early surge in demand due to overheating engines and tyre blowouts caused by expanding air.
Safety and Precautions
- Stay Hydrated: Drink plenty of water and avoid excessive exposure to the sun during the hottest hours, typically between 11am and 3pm.
- Water Safety: The RNLI warns that open water remains cold enough to trigger "cold water shock," which can cause panic and drowning. If struggling in water, the "Float to Live" technique, tilting the head back and controlling breathing while floating, is recommended.
- Home Cooling: Keep homes cool by closing curtains and windows during the day and opening them once temperatures drop at night.
- Check on Others: Regularly monitor elderly relatives, neighbours, and those with health conditions who may struggle to cope with the heat.
A Shifting Climate Context
Scientists attribute the increased frequency and intensity of these heat events to human-induced climate change. Professor Stephen Belcher, Chief Scientist at the Met Office, described the current conditions as "sobering," noting that the arrival of such temperatures in June highlights the long-term implications of a warming planet. The Climate Change Committee previously warned that by 2050, 92 per cent of homes are likely to overheat.
While the most intense heat is focused in southern and central areas, the impact is widespread. Broad amber warnings cover a 46-hour period starting Monday, 22 June 2026, with the red warnings designated specifically for the Wednesday-to-Thursday window. Historical records show that the previous UK record of 40.3C was set in July 2022.
What to Watch Next
The Met Office expects a gradual change toward a more westerly influence on the UK’s weather patterns by the end of the week, with temperatures likely to return to more seasonal averages by Saturday. However, confidence remains low regarding the exact timing of this transition. For those planning travel or outdoor activities, the Met Office advises checking local forecasts regularly via their official website or mobile application, which features tools for monitoring beach conditions and UV levels.
