THE water level in the Rewa River reached its critical level of 4.5 metres yesterday afternoon and was expected to rise further last night.
Nausori Town's special administrator Napolioni Masirewa said the critical level was reached at 11am yesterday.
Mr Masirewa said if rain continued in the highlands of Naitasiri, the water level in the river could go beyond five metres which would be dangerous.
He said because of the rising water, people living along the Rewa Delta were urged to evacuate to higher grounds as soon as possible.
Mr Masirewa said the council and police closed Nausori Town at 3pm yesterday to ensure the safety of the business community and members of the public.
"The nearest evacuation centre is the Lelean Memorial School and people living along the Rewa Delta should move there," he said.
Mr Masirewa said close to five tonnes of debris was collected from the town yesterday following Tropical Cyclone Evan.
Nausori Health Centre has been relocated to Vunivivi hill and all expectant mothers are advised to report to the Colonial War Memorial Hospital in Suva for further check-up.