Parts of southern England are set to be battered by torrential rain on Saturday which could cause “significant” flooding and a danger to life, the Met Office said.
An amber warning for thunderstorms has been issued for between 4am and 11am spanning major towns and cities including London, Brighton, Portsmouth, Chelmsford, St Albans and Cambridge.
Forecasters have warned of sudden flooding in roads and homes with some more remote communities at risk of being cut off, while delays to train and bus services are also likely.
Power cuts could also occur and buildings are at risk of damage from floodwater, lightning strikes, hail and strong winds.
It is one of several weather warnings for thunderstorms issued across the country.
On Friday, two yellow warnings are in place with one covering much of Yorkshire and the north east of England from 11am to 8pm on Friday. The second will come into place at 9pm until 11:49pm in London and the south east.
On Saturday, two yellow warnings will be in place alongside the more severe amber alert. Most of England will be covered by a yellow warning from midnight to 9pm. Eastern Scotland is also facing a yellow warning from 4pm until midday on Sunday.
A further warning for the south west of England will also come into place ad midday on Sunday and remain until 3am on Monday.
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