The Met Office has issued a rare red weather warning for extreme heat across large parts of southern England and the Midlands, with temperatures forecast to reach up to 40°C. The warning comes into effect at 9am on Wednesday, June 24, and remains in place until 9pm on Thursday, June 25. An amber heat warning is also in place for Greater Manchester from midnight on Wednesday until midnight on Thursday.
Risk to Life and Record-Breaking Temperatures
A Met Office spokesperson stated that a red alert constitutes an 'exceptional spell' of hot and humid weather, signalling a 'risk to life' and advising people to 'take action' to stay safe. The current June temperature record stands at 35.6°C, set in 1957 and matched in 1976, but this week's heatwave is expected to shatter that figure.
Why the Heat Will Feel So Intense
Weather experts point to two major factors making this heatwave particularly brutal: oppressive humidity and widespread 'tropical nights'. Unlike the historic July 2022 heatwave, which was characterised by dry heat, this event features exceptionally high moisture levels, with dew points around 22°C. When moisture in the air is this high, the human body struggles to cool itself through sweating, drastically increasing the risk of heat stress. Additionally, southern areas are bracing for consecutive 'tropical nights', a meteorological term for when overnight temperatures fail to drop below 20°C, offering little relief.
Severe Thunderstorms Expected
The sheer amount of heat and energy building in the atmosphere is creating a highly unstable environment. As intense heat forces warm air to rise rapidly, it is expected to condense into towering clouds, sparking severe, highly localised thunderstorms. Central and southern areas are at the highest risk for these sudden storms, which could bring heavy downpours, lightning, and gusty winds, offering temporary but volatile breaks in the heat.
Relief Slow to Arrive
While the peak of this extreme weather will grip the country midweek, relief will be slow. Temperatures are expected to ease slightly by Friday, though they will remain well above the seasonal average heading into the weekend. Authorities are urging the public to stay weather-aware, check on vulnerable neighbours, and monitor official updates.
