Twenty-nine flood alerts have been issued across England and Wales on Tuesday as heavy rain continues to pour.
As of 9am, the Environment Agency had issued two flood warnings for south-west England and 27 flood alerts across the rest of the country.
Met Office forecaster Luke Miall said 48mm of rain had fallen in parts of Hampshire over just six hours, while mid-Dorset experienced 36.4mm.
England and Wales can expect 30-50mm of rain on Tuesday, with up to 70mm in isolated spots by midnight, the Met Office said.
A yellow weather warning is in place.
“There is likely to be disruption throughout central and southern England this morning,” Miall said.
“I would expect quite a lot of surface water flooding on the roads. That will cause some disruption to people travelling, so you can expect journey times to be delayed.”
The Travel Dorset Twitter account, run by Dorset Council, said there were reports of “deep flooding” in parts of Dorchester Tuesday morning.
Meanwhile, the Environment Agency has two flood warnings in place for the River Frome between Maiden Newton and Dorchester, in Dorset, south-west England.
It said flooding was “expected” along the river between 8am and 6pm Tuesday.
A further 27 flood alerts, where flooding is “possible”, have been issued for rivers in the South East, East Midlands and North West of England.
The downpour is being brought by a burst of low pressure travelling across the UK, along with warm and humid air linked to the remnants of Hurricane Humberto, which hit the Bermuda coastline last week.
The wet weather is due to move further north Tuesday afternoon. However, another band of rain is forecast to hit the South West of England and Wales, Miall said.
Tuesday’s weather warning is set to last until 11pm, and although the heavy rain is expected to clear by Wednesday, a low-pressure front is expected to remain for the rest of the week.
This will bring bright and breezy weather to the UK, along with some showers or prolonged spells of rain.
Temperatures could rise to the low 20s, which is slightly warmer than average for early autumn.
The norm for this time of year is in the mid-to-high teens.
Yellow weather warnings were also in place in some places during the weekend, with scattered thundery showers on Sunday afternoon.