The ACT State Emergency Service has now received 36 calls for help overnight and a total 107 since 3pm Tuesday.
Namadgi National Park is closed one kilometre from Tharwa. This includes the Namadgi Visitor Centre.
The ACTSES advises motorists that there is localised flooding over many roads across Canberra this morning.
The ACTSES strongly urges drivers to take extra care in these areas. This includes avoiding driving through large bodies of water.
Anyone who needs emergency flood help can call the ACTSES on 132 500.