More than 1,500 members of Britain's armed forces have been put on standby to help communities wrecked by flooding, as David Cameron told the hundreds of home owners forced to flee their homes: "We're in for a long haul."
The Prime Minister is expected to hold a press conference in London tonight after returning from his overnight tour of England's south west, where homes have been wrecked and the train route connecting Cornwall with the rest of the country has collapsed.
More than 1,000 people have been forced to leave their homes in the south west and Thames Valley, with many more braced to evacuate in the coming days as weeks of heavy rainfall shows no signs of abating.
Speaking on his trip to beleaguered South West communities, Mr Cameron said: "We have to recognise it's going to take time before we get things back to normal.
"We're in for a long haul, but the Government will do everything we can to coordinate the nation's resources.
"If money needs to be spent, it will be spent; if resources are required, we will provide them; if the military can help, they will be there. We must do everything, but it's going to take time to put these things right."
Hundreds of military personnel have been drafted in to help in the worst-affected areas, as politicians and agencies get embroiled in a war of words prompted by residents' anger at a perceived lack of action.
Around 400 weather warnings remain in place across England, with forecasters predicting further heavy rainfall on already-saturated ground.
In some cases, desperate home-owners reported having their vacant homes looted, while others said sandbags intended for the worst-hit areas were "hijacked".
Last night more than 70 people were evacuated from their homes in the Thames Valley - tipping the number over the 1,000 mark since the end of January.
And Communities Secretary Eric Pickles told MPs there was a high risk that the River Severn and River Wye would also break their banks, further stretching resources.
The Met Office's Sarah Davies told a briefing that strong winds forecast for the middle of the week could add to the problems facing the country - with snow reported today in pockets of the Midlands.
Some 20-40mm (0.75-1.5 inches) of rain is expected by Friday night across many southern and western areas.
But some regions, including the already flood-hit south west of England, South Wales, western Scotland and Northern Ireland could have up to 70mm (2.75 inches).
A storm due to hit tomorrow could fell trees and cause transport and power disruption, Ms Davies warned, with winds in the South West potentially reaching 80mph.
Defence Secretary Philip Hammond was tackled by residents in the Berkshire community of Wraysbury, who said they were "seriously in need" of military intervention.
Mr Hammond told the BBC that the "Government has got a grip on this" but authorities cannot "prevent the course of nature".
Mr Hammond, whose constituency of Runnymede and Weybridge has been affected by the flooding, said now was not the time to discuss how well the Environment Agency has dealt with the situation.
He told BBC Breakfast: "Of course the Environment Agency - obviously under enormous pressure - is doing everything it can to manage this situation.
"Of course there will be longer-term questions about policy on the way flooding defences are managed, on, for example, the policy of river dredging, and the time to discuss them is when the waters have gone down, when we've gone back to normal."
The Ministry of Defence said hundreds of military personnel were involved in attempts to help beleaguered communities.
A spokesman said Mr Hammond offered the services of military personnel to assist flood relief efforts in Wraysbury.
Currently, 100 members of Z Company The Royal Regiment of Fusiliers are now arriving in the area, while m arines from 40 Commando continue to provide assistance to Somerset County Council by carrying out a variety of manual labour tasks such as filling and moving sandbags and moving residents' possessions to safety.
Approximately 30 personnel are at Chesil Beach in Dorset and are supporting the Environment Agency by repairing the flood defences using military bulldozers and excavators.
A military spokesman said: "A number of military planners are working with relevant agencies at a range of locations to scope what further support the military can offer.
"More than 1,650 personnel at a variety of locations across the south of the UK have been placed at high readiness and stand ready to receive taskings as required."
Their number has been boosted by an army of volunteers who have pitched in to help with the operations in the Thames Valley.
Meanwhile, commuters faced another day of delays on the rail networks.
There is major disruption to CrossCountry services between Oxford and Didcot Parkway, Bridgwater and Taunton, and Taunton and Plymouth/Penzance, while First Great Western said it would only be able to run four trains an hour between Reading and London Paddington because of flooding near Maidenhead.
South West Trains, Southeastern and Southern are also operating heavily-curtailed services.
Communities Secretary Eric Pickles said special efforts were being made to protect vital infrastructure from the floods to minimise disruption.
But officials have predicted hundreds more homes will be flooded over the coming days and restoring the country's battered rail network could take months.
Efforts to deal with the flooding have been overshadowed by a bitter clash between ministers and the Environment Agency, after Mr Pickles issued a barbed apology for relying on its advice.
Environment Secretary Owen Paterson - who was leading the response until being forced to undergo an eye operation - is said to have complained to Downing Street over his Tory colleague's intervention.
The Prime Minister, on a visit to Chesil Beach yesterday, praised the work of the Environment Agency but gave only limited support to its under-fire chairman Lord Smith, saying "this isn't the time for a change in personnel, this is the time for getting on, everyone has to get on with the job they are doing".
Mr Cameron said he would hold a press conference at Downing Street to discuss the response to the floods.
The PM's spokesman was asked at a regular Westminster media briefing whether Mr Cameron would consider diverting money from the UK's £11 billion foreign aid budget to help people affected by floods.
The spokesman responded: "As the Prime Minister was saying yesterday, the resources are there. That is the central point."
Labour leader Ed Miliband said flood defences should be made a higher priority for Government, even if it costs more money.
Asked during a visit to Wraysbury whether he would spend more on defences, Mr Miliband told the BBC: "Yes. We can't attribute any one event to climate change, but we know climate change is going to mean we have more events like this - more extreme weather events, more flooding, more storms.
"It's clear that flood defence needs to be more of a priority for Government."
The situation has become so severe in Surrey that police and crime commissioner Kevin Hurley has made the force's pot of up to £10 million in reserve available to help flooding victims.