The UK is bracing itself for an unpredictable shift in the weather as the Met Office extends its extreme heat warning, now predicting thunderstorms will sweep across the country. A prolonged period of sweltering temperatures has given way to a forecast of heavy downpours and lightning, potentially bringing disruption to regions already struggling with scorching conditions.
For England, the high 20s and low 30s Celsius temperatures expected in central and southern areas come with a growing threat of thunderstorms that could bring flash flooding and treacherous driving conditions. Northern England may see slightly cooler temperatures but is not immune to thundery showers.
Scotland and Northern Ireland are also preparing for a change, with warm temperatures – generally lower than in England – expected to give way to potential thunderstorms affecting travel and outdoor activities. Wales is similarly positioned, with high temperatures in the mid to high 20s Celsius expected before the onset of potential thunderstorms, particularly in eastern areas.
Light winds have characterised the heatwave so far, but the arrival of thunderstorms could see gusts reach 30-40 mph in localised areas during intense downpours. The combination of heat, potential storms, and strong winds poses a complex challenge for public safety and infrastructure.
The current weather pattern is being driven by a high-pressure system that has been dominating the UK, drawing in warm air. However, with thunderstorms forecast, this pattern is set to break down as cooler, more unstable air begins to move in – often creating conditions ripe for severe weather events, including heavy rain, lightning, and strong winds.