Twenty-five soldiers from 39 Regiment the Royal Artillery have been sent to flood-hit areas to assist the emergency services.
Rescue teams have continued their search for a 21-year-old woman who went missing in the River Usk in Powys on Saturday night. A man has been helping police establish how the woman fell into the river.
Communities Minister Rosie Winterton has been chairing a meeting of ministers to discuss what more can be done to help victims of the flooding.
Climate change
Environment Secretary Hilary Benn told the House of Commons that although the clean-up operation had begun in Cumbria, there could be some further flooding on Tuesday.
FLOOD ADVICE
Cumbria Police casualty bureau: 0800 0560944 or 0207 1580010
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He said: "I saw for myself on Friday and Saturday in Cockermouth just what an effect the torrent of water had on homes, businesses and communities. It is utterly devastating."
He said that although the flooding could not be attributed to climate change, more extreme weather could be expected in the future.
Mr Benn said a record £2.15bn was being invested in river and coastal defences over three years.
Shadow environment secretary Nick Herbert called for a formal review of flood defences in the Cumbria area. Liberal Democrat spokesman Tim Farron, who represents Westmorland and Lonsdale in Cumbria, said the devastation had brought communities closer together.
All properties in Cockermouth are being checked by engineers before people can enter.
Natalia Ekarad said she was "devastated" by the state of her home in Main Street after returning there.
"We have been here two years and were so happy. Now everything is gone," she said.
Elaine Oxon, owner of fashion store Westmidges, said she had lost her entire stock.
"The smell is absolutely horrendous - it might be contaminated," she said.
"We may never be able to open again and I feel like giving up. Everything is ruined."
Six bridges have collapsed in Cumbria and a safety review of all 1,800 crossings in the county is taking place.
The closure of Calva Bridge in Workington, which has been condemned to demolition, means people face a 30-mile detour to get to the other side of the town.
The Highways Agency said it did not expect temporary bridges to be in place before Christmas but Cumbria County Council said it might be able to construct a temporary single-carriageway bridge in Workington before then.
Cumbria County Council chief executive Jill Stannard, who took up her post only last Thursday, put the damage in the area at "tens of millions of pounds".
Cumbria Chief Constable Craig Mackey said it could take years for the affected areas to recover.
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