In 24 hours in South Wales, 105mm of rain fell, while gales of up to 91mph were recorded in the area.
A major incident has been declared in South Wales after Storm Dennis left severe flooding in its wake.
It means a multi-agency response has been triggered as rescuers battle to get to victims by helicopter and boat.
Storm Dennis has also meant the Environment Agency declared the highest number of flood warnings and alerts on a single day in England.
There were 594 alerts in place at 12pm, including four severe warnings in England and widespread amber alerts from the Met Office. There are also two severe flooding alerts in Wales.
Across the country:
- Two severe flood warnings are in place for the area around Pontypridd, South Wales, as well as an amber rain warning from the Met Office.
- In England, four severe flood warnings remain in place around the River Teme in Worcestershire, as well as hundreds more alerts across the country.
- In Scotland, a number of alerts and warnings have been removed and a warning for high winds has now been issued by the Met Office.
- In Northern Ireland, high winds threaten to batter the country later on, before Storm Dennis moves north to the area.
Gwent Police said that residents of Skenfrith, Monmouthshire, were being advised to evacuate due to the flooding.
At Nantgarw near Cardiff rescuers brought people from their homes in boats after the river Taff burst its banks. A helicopter was seen winching someone clear of floodwater at Crickhowell on the river Usk.