Heavy rain is predicted for the ACT this weekend, bringing with it much-needed relief for firefighters battling the Orroral Valley bushfire.
However, flash flooding could impact parts of the fireground due to the bushfire devastation.
The Bureau of Meteorology has forecast up to 40 millimetres to fall across the capital over Saturday and Sunday with as well as expected showers on Friday.
The rain has been brought on by a trough off the NSW coast making its way south.
Meteorologist at the bureau Helen Kirkup said the weather system would move through the South Coast before coming into Canberra.
"The South Coast region will be impacted over the next few days and it will be heaviest over the weekend," she said.
"This means that moisture will continuously go into the west and bring it over the Canberra region.
"We're set to get 10 to 25 millimetres on the Saturday and the Sunday, and the cumulative totals could be more depending on how the showers fall."
While the rain will come as a relief to firefighters and ease conditions on the firefront, the rain could create new issues in the Namadgi National Park.
The bureau said large rainfall could lead to localised flooding in mountainous areas due to the large amount of burnt land.
"The ash will repel the water and it will all run off, depending on the terrain," Ms Kirkup said.
"If it's in mountainous areas, then that will be an intense run and lead to potentially unstable ground.
"We've got a lot of burnt trees that could potentially fall over in decent ranfall, and it could be a hazardous weekend for some people."
The bureau said the risk of flooding would be greater along the South Coast where the weather system was strongest but urged Canberrans to remain alert.
Parts of NSW have been forecast to receive more than 100 millimetres over the next week as the weather system moves down the coast.
Areas of northern NSW started seeing large rainfalls on Thursday, leading to a severe weather warning being issued for the region.
Rain has been seen falling in drought-affected areas of the state.
The rainfall is also expected to bring with it thunderstorms over Canberra in coming days, although the bureau said it was unlikely lightning would start new fires in the area, due to the increase in moisture.
#Rain has been forecast for #NSW and the #ACT over the next few days. Now is the time to clean out those gutters! For all warnings https://t.co/7iSojrZ31E For information on preparing for heavy rain refer to #ESA#FloodSafe at: https://t.co/mxGueqSUeopic.twitter.com/iIZXs7dmBC
— Bureau of Meteorology Australian Capital Territory (@BOM_ACT) February 4, 2020
"We'll also see consistent winds across the region, but the speeds will depend on how the trough develops," Ms Kirkup said.
"What we might see is some stronger winds coming through, up to 40km/h, depending on how the trough develops, but we'll mostly see winds about 20 to 35km/h."
Showers are still forecast for Monday with up to 20 millimetres predicted with a top of 24 degrees.
The rain will ease on Tuesday and Wednesday with a high of 27.
