The State Emergency Service (SES) units were called out to six life-threatening flood rescues in four days in the Highlands, along with 122 requests for help.
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SES Southern Highlands local commander Dylan Whitelaw said it has been "pretty busy" since June 6, with the excessive rain and wind.
He said there were also two emergency evacuations in Bowral, a ceiling collapse in Exeter, and water entering properties in villages such as Bundanoon and Penrose.
Crews have been out "for 24 hours", and clean-ups were continuing.
"We're still seeing residual jobs trickle in today," Mr Whitelaw said.
To put it into perspective, there were 120 requests for assistance in the whole month of April.
Almost 127 millimetres of rain were recorded at the Bureau of Metereology's Moss Vale weather station on Friday (June 7), and more than 36 millimetres the day prior.
More than 174 millimetres of rain has been recorded since June 1, data from the weather station reveals.
Due to "strong winds" and wet soil, there was also "significant tree damage", he said.
It was important to establish a flood plan and ensure properties were prepared for rain, flooding and strong winds.
"It's really important now more than ever," he said, with predictions of extreme rain and flooding continuing with the World Meteorological Organisation declaring a return of La Nina this year.
The Highlands local commander also said it was important for people to remember that a vehicle was no match for floodwater, regardless of its size.
The SES advises the following to ensure properties are prepared for storms and extreme weather:
- Maintain yard and balconies: identify items that can lift in strong winds and ensure they are secure and keep the yard tidy
- Clean downpipes, gutters and drains
- Trim trees and branches
- Keep the roof in a good condition
- Prepare an emergency exit if needed
- Prepare an emergency plan
Call 132 500 for assistance and if it is an emergency, contact Triple Zero.