The UK's sizzling heatwave is set to make way for a dramatic return to autumn's chill, with forecasters warning of significant temperature drops and increased chances of rain by this weekend. Temperatures that have soared into the mid-20s in parts of England are expected to plummet to between 15°C and 18°C by Friday, while Scotland and Northern Ireland will see temperatures settle around 12°C to 15°C.
The shift is being driven by a cold front pushing southwards across the country, bringing with it an increased likelihood of rain and thunderstorms. Southern England and Wales are at risk of heavy downpours and lightning activity as the frontal system moves through, while wind speeds are expected to pick up, potentially reaching gusts of 20-25 mph in exposed coastal areas.
Regional breakdowns show varying timings for the shift, with Northern Ireland and Scotland likely to experience the cooler air and increased chance of showers from Wednesday evening into Thursday. For England and Wales, the transition will be more pronounced towards the end of the week, with Friday and Saturday marking a distinct change from the recent warmth.
The Met Office has advised that while no severe weather warnings are currently in place, localised flooding could be a risk in areas experiencing intense rainfall. The shift in weather comes as the UK prepares for an extended period of cooler conditions, prompting health advice regarding sun exposure and hydration to give way to tips on staying warm and safe during the changeable weather.
The Met Office attributes this shift to a change in the prevailing air mass, moving from a southerly flow bringing warm air from continental Europe to a more westerly or north-westerly flow. This will draw in cooler, more unstable air from the Atlantic, leading to the more autumnal feel anticipated for the coming days.