Overview

• Heavy rain and thunderstorms expected across much of the UK, with up to 40mm of rain in a few hours.
• Met Office warns of localized flooding, power cuts, and difficult driving conditions.
• Weather warnings in effect from Monday morning through Tuesday evening.
• Southern regions to see improved weather by midweek with temperatures rising to 26°C.
• St Swithin's Day folklore suggests continued rainy weather, but Met Office dismisses the superstition.