A severe weather warning has been issued for the Central Coast and Hunter, and the State Emergency Service (SES) said there was potential for torrential rainfall on Sunday.
The rain is expected to cause minor flooding around Tuggerah Lake today.
"Heavy rainfall has been observed in the past 24 hours over the Tuggerah Lake catchment. Further heavy rainfall is forecast for the next 24 to 36 hours which may cause further river level rises," a spokesperson for the SES said.
The Tuggerah Lake at Long Jetty is expected to reach the minor flood level (0.90 m) early Sunday morning.
"Further rises are possible with forecast rainfall," the spokesperson said.
At 3.40am today, the Wyong River, at Gears, had risen 4.09 metres and was steady.
At 1.30 this morning, Tuggerah Lake, at Long Jetty, was up 0.83 metres and rising.
Local communities should closely monitor the situation and plan ahead around possible road closures and inundation of low-lying areas if lake levels continue to rise.
The SES advises residents to:
- stay out of rising water, and seek refuge in the highest available place;
- prevent damage to your vehicle. Move it under cover, away from areas likely to flood;
- avoid being swept away. Stay out of fast-flowing creeks and storm drains.
- never drive, ride or walk through flood water. Flood water can be deceptive and dangerous.