An aerial view of the Lachlan River in and around Forbes.
Rising floodwaters expected to inundate two rural NSW towns may cause problems with power and sewage for several days, despite lower and later-than-predicted peaks.
Residents at Forbes are being advised to evacuate as the Lachlan River swells to an estimated peak of 10.7m by midnight Sunday following 17mm of rain overnight Saturday.
The ADF, NSWFRS, RFS and SES are at nearby Condobolin, building barricades with sandbags as they wait for the water to arrive, and it's likely authorities will be busy in the area for another few weeks, SES spokeswoman Sue Pritchard said.
"It's slow to rise and slow to fall," she said on Sunday evening.
Since the rain began on August 30, the SES has received 2343 calls for assistance and has performed 96 flood rescues.
No people needed rescuing on Sunday but volunteers were kept busy saving horses, cattle and sheep at properties expected to be impacted.
Comment: Earlier this month flooding affected Victoria and South Australia following record rainfall.