Multiple bushfires are burning at emergency levels across New South Wales' Snowy Mountains region.

NSW RFS has issued emergency warnings for the areas of Tinderry, Calabash, Anembo and Jerangle in the Snowy Monaro area.

"These (fires) have started as a result of the Clear Range fire. These fires are more than 880 hectares in size and are out of control," NSW RFS said in its warning.



"A number of spot fires have started to the east of Colinton and west of the Strike a Light Nature research as a result of the Orroral Valley bush fire in the ACT."

The NSW RFS said the fire is spreading in an easterly and north easterly direction under strong south westerly winds.

"These conditions are causing increased fire activity and are making it challenging for firefighters to slow the spread of fire. Low visibility due to smoke is making it difficult for aircraft," they said.