On Sunday, the yellow weather warning continues and rain hangs over much of the North West, Wales, the South West, London and the South East.
While Storm Dennis is not expected to be as strong as Storm Ciara, the short time between the storms means that Dennis will be compounding the disruption already present on the troubled United Kingdom roads.
Paul Gundersen, chief meteorologist at the Met Office, said: "Another spell of very wet and windy weather is expected for Saturday".
Meanwhile in the United Kingdom, the British Met office is warning of a threat to life, with the impact of Storm Dennis likely to be worse than last weekend's Storm Ciara.
An NFU Mutual spokesman said: "Storm-force winds in rural areas can cause significant damage as farms and homes are situated on higher ground and less protected by other buildings".
Cllr Stuart Hughes, Devon County Council Cabinet Member for Highway Management, said: 'The rain that's forecast for this weekend is expected to be heavier than last weekend so we could well see more flooding problems on Devon's roads.
Network Rail has advised passengers to expect disruption on many routes due to flooding and to allow more time for their journeys.
"No changes to train services on Saturday or Sunday due to the forecast adverse weather have yet been announced, but further updates will be issued should anything change".
"All planned events for the weekend have been postponed, so if you were planning on attending an event please refer to the organiser for new dates". "It is important for people to be aware of their flood risk and stay safe by signing up for flood warnings, making a flood plan and remembering not to drive or walk through flood water - it's not worth the risk".