Heavy rain, hail, and thunderstorms are expected to disrupt 38 areas across the UK on Wednesday, with north Wales and parts of the Midlands being particularly affected. The Met Office warns of a significant band of low pressure moving in from the west, leading to widespread rain by 2 PM. Central England could see intense rainfall of up to 16mm, while Gloucestershire and Oxfordshire may receive about 8mm. Temperatures have dropped to 12.6 °C in Malham, contrasting sharply with last month's heatwave. Although London is likely to avoid the worst of the rain, isolated showers are still possible. The rain will gradually clear from Wales, Devon, and Cornwall by late afternoon, but areas like Essex and Hertfordshire are expected to bear the brunt of the downpours with up to 8mm anticipated. By the weekend, conditions are expected to improve, with temperatures rising to 26-28 °C in some southern areas.