Braunton flooded after river defences breached 22 December 2012 Last updated at 14:00 Dozens of properties have been flooded in a Devon village after £1m river defences were "overwhelmed" with water. The main road through Braunton is under several feet of water as heavy rain led to flooding across the South West. In Cornwall, about 120 properties have been affected and the Environment Agency has issued four severe flood warnings, all in south-west England. Some roads have been cut off and First Great Western has advised passengers not to travel. The Met Office has an amber warning for more heavy rain across the south-west of England for Saturday and Sunday and for Devon and Cornwall on Monday. Absolutely flooded The Environment Agency said the River Caen had breached a section of the flood defence in Braunton. In June, when the defences were completed, the agency said the works meant flooding of the river would be reduced from a one-in-20 chance of occurring in a particular year to one-in-100. Flood prevention walls, a flood relief culvert and the river was widened during the work. But chairwoman of Braunton Parish Council Liz Spear said the defences were overwhelmed by the volume of water that hit the town. She said: "It's really bad. We had flooding seven years ago, but it was nothing like this. Resident Elma Blackmore said: "Nobody can get in or out at the moment. Braunton is absolutely flooded and it is cut off at the moment. Apparently it all came down Church Street and has just run all the way down through the village. The ground is just so waterlogged the rain has got nowhere to go. Dozens evacuated In Helston, Cornwall Fire Service said 190 people were advised to leave their homes shortly after 01:00 GMT amid fears over the level of the River Cober. Cornwall Council said at 09:00 GMT the situation had calmed, but agencies were on standby in preparation for further downpours. Fire crews attended incidents at St Austell, Lostwithiel, Looe, Helston, Hayle, Torpoint, Penzance, Probus, Durgan, Millbrook, St Columb and St Just. In Devon, residents in the village of Colebrook, near Plymouth, were evacuated and in Plympton 15 people were forced to move after the Long Brook burst its bank In Dorset, several motorists have been rescued from vehicles stuck in flood water. Meanwhile in Sussex heavy rain is thought to have caused a mudslide which has partially blocked Powdermill Lane at Catsfield. In total, the Environment Agency has issued more than 90 flood warnings, meaning flooding is expected, and more than 270 flood alerts, meaning flooding is possible, for England and Wales.