Pumps are in operation in Malton, Norton, Old Malton and Brawby, North Yorkshire Police said.
Currently the unit at Malton is open seven days a week between 08:00 and 21:30.
Fire crews had also deployed six pumps in Malton and Norton as a precaution.
The existing 42 branch libraries are to be retained, but the Malton and Norton libraries will merge.
The River Derwent has peaked through Malton but water levels would remain high for some time, the agency said.
Some residents in Norton, near Malton, said police had been knocking on their doors urging them to take action.
It also reduced the opening hours of the minor injuries unit at Malton as part of cost-cutting measures last December.
It will be Saturday before the level of the River Derwent at Malton starts to drop, the Environment Agency has said.
They said they had designed and tested alternative approaches that remove through-traffic while still allowing movements between Malton and Norton for other traffic.
Malton, Old Malton and Norton are defended from the river but surface water and backed-up drains have flooded several properties in the area.
Woollons and Harwood, which has kitchenware and gift shops in Thirsk and Helmsley and a warehouse in Malton, was targeted three times last year.
BBC: Family firm Woollons and Harwood closes after 112 years
Officials at North Yorkshire County Council and Ryedale District Council have revised their plans for the centre of Malton and an exhibition is to open.
Since the beginning of December, the unit at Malton hospital has cut its opening hours and closed on weekends in a bid to save money.
Derwent, Lower Derwent from Elvington to Barmby, and Malton and Norton.
The exhibition is at the Green Man Hotel, Market Place, Malton, from 1300 to 1930 GMT on Friday and from 0900 to 1300 GMT on Saturday.
Police said their cold case review of the death may be helped by the recovery of DNA material from the body which is buried at Malton Cemetery.
The poll in one remaining constituency - Thirsk and Malton - has been delayed until 27 May, owing to the death of the UKIP candidate, John Boakes.
Jamie Kyne, 18, from County Galway in the Irish Republic, and Jan Wilson, 19, from Forfar in Angus, Scotland, died in the fire near Malton in September 2009.
Mr Gray said he believed nine staff at Malton would be affected by the change and might have to be redeployed temporarily to hospitals elsewhere in the county.
Low Penhowe guest house at Burythorpe, near Malton was named as the Guest Accommodation of the Year winner and Noelles Cottages at Pickering had the recipe for success as the self-catering holiday venue.
If the ups and downs in the party's fortunes had occurred uniformly across the country, Mr Cameron would have won only 291 seats rather than the 307 he is likely to have obtained once the delayed election in Thirsk and Malton is held later this month.
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