Brits are being told to brace themselves for more intense storms as over 50 flood alerts were issued with parts of the country submerged.
An amber warning remains in place for some areas, with as much as 50mm of rain arriving over higher ground on Sunday.
Today’s London Marathon saw around 45,000 drenched runners brave heavy rain and high winds for the virtual 26.2-mile race.
Large parts of Buckinghamshire Golf Club, meanwhile, remain under water while roads in Somerset stayed closed this afternoon.
An Essex family had to be rescued by firefighters on Saturday after their car became trapped in floodwater in Billericay.
In Wales, the river Afon Aber in Aberygwyngregyn burst its banks following heavy rainfall across the region. Six regions in north Wales are on amber alert, the DailyPost report.
Travel chaos will continue on Sunday with RAC Breakdown spokesman Rod Dennis saying conditions are “miserable if not downright dangerous” for drivers across the UK.
It is Britain’s worst weather since last winter as Storm Alex’s 63-hour, seven-inch rain deluge continues.
But it is far from over – there is a new 70mph Atlantic tempest hitting from midweek.
The Environment Agency warned of floods across England until tomorrow.
Britain is in a “washing machine” of low pressure swirling around the country, with the Met Office forecasting more heavy rain bursts from Monday and gales ahead, worst in the West.
Things will get even worse next week.
Gusts of 70mph and two inches of rain are shown from Thursday on forecast models, as a new storm arrives.
Met Office forecaster Marco Petagna said: “Conditions are awful. Low pressure areas are feeding from Storm Alex.
“There’s little change into the week ahead with spells of wet and windy weather and a cool airstream.”
MetDesk said: “The UK is in a washing machine of low pressure spinning around the country.”
Ex-BBC and Met Office forecaster John Hammond of weathertrending added: “Storm Alex has ushered in very wet spell, with a soggy outlook as areas of low pressure bring a lot more rain and wind over the next week.
“There will be impacts,” he warned.
Another Met Office forecaster said: “Heavy showers are forecast from Monday, with all parts seeing more rain, likely heaviest in the South and West.
“It will often be windy, with a risk of gales, particularly in the West and South-West.”
The Environment Agency said: “Flooding is expected to continue on Monday for parts
“Properties could flood and there could be travel disruption.”
UK Met Office forecasters said Alex is known as a “weather bomb” as it strengthened as its air pressure plunged more than 24 milibars in 24 hours.