Thunderstorm warnings have been issued across parts of the country on Wednesday as the Met Office warns of flooding and disruption.

Yellow warnings for storms will be in place across England and Wales from 3am til 10pm on Wednesday. The west and east Midlands, as well as the north west, south east, south west and east of England will all be under yellow thunderstorm warnings, as will parts of Wales.

The Met Office warned there is a “small risk of flooding and disruption from thunderstorms on Wednesday.”

A band of heavy showers and thunderstorms is expected to move northwards on Wednesday morning, the forecaster warned, adding that an intense downpour of 20-30 mm rain could fall in less than an hour.

A thunderstorm warning is in place across England and Walesopen image in gallery
A thunderstorm warning is in place across England and Wales (Met Office)

Some spots could see 40-50mm in two to three hours, leading to some surface water flooding, with the possibility of large hail and frequent lightning.

These showers and thunderstorms are expected to drift northwards and ease during the evening.

Homes and businesses could be flooded quickly, the forecaster said, with damage to some buildings from floodwater, lightning strikes or hail. Flooding and lightning could cause delays and cancellations to train and bus services.

The risk of spray and sudden flooding could also lead to road closures and difficult driving conditions, the forecaster added, with a chance of power cuts for some parts of the country.

Met Office deputy chief forecaster, Mark Sidaway attributed the unsettled weather to warmer and more humid air moving north across the UK.

Rain is expected across parts of the country on Wednesdayopen image in gallery
Rain is expected across parts of the country on Wednesday (Met Office)

“While many areas will see dry and increasingly warm conditions at the start of the week, attention is turning to the potential for heavy rain and thunderstorms from Wednesday onwards.

“As warmer and more humid air moves north across the UK, there is an increasing likelihood of some heavy rain developing. Some places could see 20 to 30mm of rain in just a few hours, while there is also the potential for higher totals where thunderstorms repeatedly affect the same locations.

“The detail of which areas will see the heaviest rainfall is still uncertain, so stay up to date with the forecast this week to keep updated on the increasing risk of impactful weather during the latter part of the week.”

By Thursday, a band of heavy and thundery rain is expected to move northwards through England and Wales slowly, which could lead to substantial rainfall totals.

People under an umbrella in the rain on Sunny Sands Beach on August 19, 2026 in Folkestoneopen image in gallery
People under an umbrella in the rain on Sunny Sands Beach on August 19, 2026 in Folkestone (Getty)

The incoming downpour comes as England and Wales are expected to record one of the driest summers on record. Almost three quarters of England was designated as under drought, as was the entirety of Wales.

Scientists previously warned that a heavy downpour could cause more harm than good following the dry and hot summer as it could lead to flash flooding in parts of the country.

The Environment Agency flood forecast for the next five days suggests that local flooding from surface water is “possible more widely on Wednesday” which could bring deluge to land, roads and some properties.

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