More wet weather has been forecast for the county over the coming days, with river levels in York expected to rise and a major incident already declared in South Yorkshire.
Following the Met Office's warning of the arrival of Storm Christoph, Public Health England (PHE) also issued a cold weather alert for Yorkshire and the Humber, starting from “first thing” on Thursday until 9am on Monday.
North Yorkshire County Council meanwhile said that more than 15,000 sandbags were at the ready around the county after highways teams doubled the number to be deployed.
North Yorkshire Police and North Yorkshire Fire and Rescue Service have both appealed for drivers to take care ahead of expected heavy rainfall.
A spokesperson said: “With more wet weather being forecast and flooding now being a risk, both organisations are working closely with other agencies to keep routes as clear as possible and divert motorists if absolutely necessary. If you see a diversion, please remember it’s there for your safety.
“With the wet weather likely to continue for most of the week, do not take chances by driving through flood water.
“If you come across a flooded road or a road closed sign we’d ask you to turn around and find an alternative route.
“Just 60cm of standing water and 30cm of flowing water can be enough to float/move your vehicle. So please don’t take the risk!”
Authorities in the county said they were providing support to people travelling to Covid-19 vaccination appointments and testing sites ahead of the warnings of heavy rainfall.
Dr Bruce Willoughby, NHS North Yorkshire Clinical Commissioning Group governing body member and clinical lead for community and integrated care, said: “If you have an appointment to attend a Covid vaccination clinic over the next couple of days, allow yourself a little bit of additional time to get there.
“With persistent rain anticipated across parts of North Yorkshire, some of the region’s roads, particularly those in more remote areas, may be hazardous and require additional care.
“Stay alert and please follow any diversions that have been put in place.”