Storms lashed Britain on Friday, flooding houses and causing transport chaos in Wales and southwest England. Forecasters said there was more heavy rain to come and said there could be more flooding as the storms moved north. The Taff river in south Wales burst its banks and the government's Environment Agency published about 40 other flood warnings on rivers in England and Wales. Overflowing rivers and storm drains flooded houses and stranded motorists in Wales and southwest England. The South Wales Fire and Rescue Service said it had received more than 350 flooding calls in a six-hour period, including for people trapped in their cars by rising water. Roads were impassable in parts of Wales while police in Gloucestershire, southwest England, warned motorists to travel only if necessary because some roads were under water. Rail company Arriva Trains Wales also advised passengers not to travel. Phil Rothwell, head of flood risk at the Environment Agency, urged people in flood-prone areas to keep an eye on weather forecasts. "Rivers are rising very rapidly and bursting their banks, also the drainage system that takes the water away from our urban areas is also failing," he told BBC television. Over the next 24 hours he said the heavy rain was forecast to move northeast, through central England and into Yorkshire and northeastern England. (Reporting by Tim Castle; Editing by Alison Williams)