The UK is set to experience a significant rise in temperatures next week, with 27 counties forecasted to exceed 20°C. The Met Office predicts that some areas, particularly in the south, could reach 24°C on Wednesday. This warm spell follows the adverse weather conditions brought by Storm Dave, which resulted in road closures and train disruptions over the Easter weekend. Meteorologist Greg Dewhurst noted that warmer air will move in from the near continent, leading to these higher temperatures. The warmest conditions are expected in southern, southeastern, and eastern England, as well as the Midlands. As temperatures rise, health officials warn that older adults and those with underlying health conditions are particularly at risk. They recommend staying cool indoors, drinking plenty of fluids, and avoiding sun exposure during peak hours. Residents are advised to keep abreast of weather updates and any extreme heat warnings.