Christchurch hospitals have cancelled most non-urgent, elective surgeries this week.
Canterbury District Health Board (CDHB) today said it would contact patients with pre-arranged admissions for Wednesday, Thursday and Friday at Christchurch, Christchurch Women's and Burwood Hospitals.
Caesarean sections and inductions would continue as planned, and outpatient clinics were still operating as normal.
CDHB communications manager Michele Hider said there was a steady flow of patients coming into the hospitals, with a noticeable increase in the number of cardiology admissions.
Akaroa Hospital, Lincoln Maternity Hospital and the Burwood Birthing Unit remained closed.
CDHB also issued a number of health messages, advising people to boil water, wash their hands regularly and avoid contact with sewage.
