There are 37 flood warnings and 89 flood watches after heavy overnight rain in Wales and south-west England.
The rain is expected to ease on Monday before returning next day
The Environment Agency has issued 31 warnings in Wales, five in south-west England, and one in the Midlands.
However the Met Office has stood down warnings for heavy rain for Wales, the West Country and Devon and Cornwall.
A spokesman said the rain was now heading across the south-east of England and would come in heavy bursts during the afternoon and evening.
'Pulses of rain'
They said in the 12 hours to 1200 GMT 3.3cm of rain fell in Bodmin, in Cornwall, and 2.3cm in Bristol. More than 3cm was also recorded in Ceredigion in Wales.
"We had some heavy rain across the south-west of England and in parts of Wales," a spokeswoman said.
"There are more pulses of rain coming, moving over the next 12 hours across the south-east of England.
"There will be some heavy rain mixed in with that, although it will not be as heavy as we saw in the South West."
The rain is expected to ease on Monday before a return to wet weather on Tuesday.
On Saturday, the Met Office warned parts of the UK faced a 70% chance of disruption over the weekend due to torrential downpours.