Following a period of warm weather, London experienced storms overnight on September 21, signaling a dramatic shift in conditions.

Met Office meteorologist Jonathan Vautrey has officially declared the end of summer, characterized by heavy showers and thunderstorms.

A significant storm is set to impact a 200-mile area across the UK, including London, with forecasts predicting thunder and lightning.

This 'megastorm' is expected to deliver an astonishing six weeks' worth of rain within just 12 hours on Sunday.

In anticipation of the storm, the Met Office has issued a weather warning for heavy rain across much of the country for both Sunday and Monday.

The daily forecast indicates unsettled weather, featuring cloudy skies, intermittent rain, and cooler temperatures, along with risks of thunder.

Meteorologist Becky Mitchell has warned that thunderstorms may persist in the coming days, raising concerns about localized flooding.