Temperatures could reach around 29C in south-east England on Thursday and Friday, with similar conditions expected on Saturday.
Thunderstorms are predicted across parts of the UK throughout the week, bringing a risk of torrential downpours and potential weather warnings, especially in central and southern England and Wales over the weekend.
This weather pattern follows a brief reprieve from the summer's third heatwave and occurs amid warnings from the Environment Agency about potential drought conditions in more regions.
Despite the warmth, the Met Office indicates this period will be more akin to typical summer weather, with increased rainfall, unlike the highly impactful previous heatwave.