From the Maitland Mercury report:
The 1955 Maitland flood was one of the most severe catastrophes to ever hit the region.
It destroyed thousands of homes as water inundated the city and claimed several lives.
On Wednesday February 23, 1955 heavy rain began falling in the Upper Hunter Valley. This would be the beginning of a horrendous week for the people of Maitland.
Full article available at Maitland Mercury, 23 Feb 2017.