Hospitals across England are struggling to cope with the influx of injured people as continuing freezing weather leaves roads and pavements treacherous.
Hundreds of people have suffered fractures slipping over. Outbreaks of norovirus have added to the problems.
At the Royal Cornwall Hospital in Treliske, nearly all A&E admissions are weather-related.
People in Worcestershire have been urged to go to hospital only in an emergency.
The county's NHS managers said hospitals were struggling with the number of patients with broken bones and respiratory problems.
An outbreak of norovirus has made the situation in Worcestershire and some other areas even worse.
Hospitals in Lancashire have made a plea for unused Zimmer frames as they struggle to cope with patients injured as a result of slipping on the ice.
Emergency referrals to fracture clinics in Chorley and Preston have risen by 75% since 21 December, with 515 patients being treated after falling.
England has seen temperatures plunge to as low as -18C (1.4F) in the last few days, causing treacherous conditions on roads and pavements.
Thousands of schools remain closed and councils are struggling to grit roads.
There have also been more delays and cancellations for travellers.
Easyjet has cancelled some flights at Gatwick, Liverpool and Stansted.
Passengers are advised to check the status of their flights before leaving for the airport.
South West Trains, Southern and Southeastern are among the train companies operating revised timetables.
Up to 4,000 homes in Reading were without water after a main burst outside the Royal Berkshire Hospital.
Thames Water said engineers were working to fix the problem and bottled water was being delivered to those whose supplies had been cut off.
Woodford in Greater Manchester recorded the lowest temperature overnight on Thursday of -17C (1.4F) and remained the coldest place in England on Friday.
More snow is forecast for large parts of eastern England. Up to 10cm (3.9in) of snow is expected to fall over the North York Moors later and up to 5cm (2in) in Kent.
A Met Office spokeswoman said: "It's going to stay very cold and quite windy.
"The cold weather will stay with us over the weekend as well when there will be further snow showers in north-east and south-east England."
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