The UK is bracing for an 'unsettled weekend' as the Met Office forecasts heavy rain across nearly all regions. An area of low pressure forming in the western Atlantic is expected to bring rainfall, with the weather remaining unpredictable. The Met Office's deputy chief forecaster, Greg Wolverson, indicated that while Saturday may be breezy, there is a risk of strong winds and disruption due to the evolving system. Rain is expected to move north-eastwards throughout the day, with certain areas, particularly in the northwestern UK, likely to experience successive heavy rain. The regions facing rain include East Midlands, Greater London, North East England, and South West England, among others. Despite the rain, a heatwave is forecasted to return later in June, with temperatures potentially soaring to 32°C in southern regions. Residents are advised to stay updated on the changing weather conditions.