Nearly three inches of rain could fall over parts of England and Wales on Wednesday, forecasters have warned.
A yellow weather warning has been issued for parts of south-west England and Wales from early on Wednesday morning, through to midday.
Homes and businesses could be flooded, with some interruption to power supplies and other services, while bus and rail services may also be affected, leading to longer journey times.
Met Office meteorologist Greg Dewhurst said: “We could see quite widely across western parts of the UK 10 to 20mm (0.4 to 0.8in) of rain.
“But over those higher ground spots of parts of Wales, south-west England in particular, we could see 40 to 50mm (1.5 to 1.96in) and then locally 60 or 70mm (2.36 to 2.75in) of rain.”
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He said the heavy rainfall could cause some flooding.
“This falling on the back of what has been a wet winter, wet month… we could see some flooding develop as we move through tomorrow morning,” he said.
The afternoon will bring respite from the rain, with sunny spells in parts of the country.
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“It becomes much brighter into the afternoon through Wednesday with sunny spells,” he said.
“It takes time to clear across some central southern parts of the UK so it might stay cloudy here and then some parts of southern England may continue to see rain through the day.”
Strong winds could also bring gales around coastal areas.
Temperatures across the country will generally range between 12C to 14C, he added.