Heavy rain across the ACT has eased conditions for firefighters battling the Orroral Valley bushfire, but crews say "the hard slog" is yet to come.
Parts of the Namadgi National Park received up to 100 millimetres over the weekend, which has broken up the more than 80,000-hectare bushfire.
However, multiple hot spots remain across the fireground with emergency authorities saying it would still be several days before the bushfire, that burnt more than one-third of the ACT, can be declared extinguished.
Incident controller Neil Cooper said crews would be sent into the fireground by helicopter to monitor hot spots and spot fires over coming days.
"The mood among firefighters is mixed. There's a big sense of relief about the rain and preventing further progression, but it's tinged with the knowledge we're now in for the hard work. This is the hard slog," Mr Cooper said.
"The fire is not going anywhere, and while the fire is not progressing, logs are still smouldering and burning."
The recent rain has given firefighters a chance to recover. Most ground crews were pulled off the fireground during the height of the downpour.
Crews will aim to create a 100-metre perimeter around the fire to prevent it spreading and heat-seeking helicopters will be deployed across the fireground searching for hot spots.
Mr Cooper said firefighters would be taken by helicopter to remote parts of the national park to help put out the spot fires.
"A lot of these hot spots are logs and stumps and they can burn for weeks," Mr Cooper said.
"A lot of the area is inaccessible and steep, forested terrain and we'll need to cut in helipads so we can land crews in and walk through the bush to the fires to put them out.
"This is not for the faint-hearted, and it's going to be quite arduous."
The Orroral Valley fire will only be declared extinguished once no spot fires have been seen across the fireground for 24 hours.
While more rain is expected in Canberra on Tuesday, it won't match the significant rainfall that fell across the capital on Monday.
More than 66mm of rain fell in the 24 hours to 9am on Monday, according Bureau of Meteorology.
The mean February rainfall at the Canberra airport is 64.8mm.
The ACT SES received 459 calls for help as of 10pm on Monday, many of them calls for leaking roofs and broken skylights.
While Canberra has received a large amount of rain, Icon Water says it wouldn't immediately lead to an increase in ACT dam levels.
"Our catchment landscapes are very dry at present, so most of the water is absorbed, rather than captured in storage from run off in our catchments," an Icon Water spokeswoman said.
"While we are fortunate to have rain at present, the ACT and surrounding regions are facing unprecedented weather patterns, both in extreme temperatures and reduced rainfall, which result in significant reductions in inflows to our dams."
The weekend's rain mostly fell near Corin and Berndora Dam.
While there has been a small increase, the water supplier says it was not enough to significantly increase catchment levels.
Up to 15mm of rain is expected on Tuesday and another 10mm on Wednesday.
Most of the NSW fires burning in the ACT surrounds are under control.
The Clear Range fire, which was sparked by embers from the Orroral Valley blaze, has been under control since the weekend.
The fire destroyed 12 homes in the Bumbalong area and Colinton earlier this month.
The Calabash fire, burning south-east of Michelago, is also under control.
The Rolling Ground and Scabby Range fires, which grew on the western flank of the Orroral Valley fire, are being controlled.
Monaro Team RFS deputy incident controller George Shepherd said on Tuesday that parts of the firegrounds received more than 100 millimetres of rain since Monday.
He said crews fighting fires in the Monaro district and machinery were taken off the fireground on Tuesday due to the conditions.
It comes as seven major fires burning in NSW have been extinguished since Friday due to rainfall, these included the Currowan fire and the Gospers Mountain "mega-blaze".