Canberra on flash flooding alert

Canberra is on alert for flash flooding as local emergency services workers continue to respond to calls for help following days of heavy rain.

The ACT State Emergency Service on Saturday said it had received a total of 604 calls for help since Tuesday.

Crews spent much of Saturday helping people deal with minor flooding, downed trees and branches and leaking roofs across the territory.

The Bureau of Meteorology on Saturday issued a severe weather warning for possible flash flooding.

Rainfall over the ACT is forecast to increase later on Saturday and continue into Sunday morning.

The rain is expected to ease by Monday.

Authorities are warning people to keep clear of fallen power lines, creeks and storm drains.

The rain has also forced the closure of a number of rural roads.

Just across the NSW border, Queanbeyan also remains subject to a flood warning.

However the Queanbeyan River has fallen to below 3.9 metres, which is below the minor flooding level.

The Queanbeyan SES has urged residents to stay informed because further rain could force the river to rise again.

"We have received 97 requests for assistance since the start of the flood event and have completed all of these," Queanbeyan SES deputy local controller Robert Cunneen said.

-AAP