Dunedin Hospital has hit capacity and the Southern District Health Board has declared a "code black" as it calls on the public to avoid the emergency department if possible.
SDHB chief executive Chris Fleming said this afternoon that the hospital was doing its best to deal with heavy demand at a time of high occupancy, but patients could experience delays and some operations had been postponed.
"We are asking the public to go to their GP early, use the after-hours service and keep the ED for emergencies only, Fleming said.
But the issue was ''a whole of system" issue and not restricted to the emergency department, he said.