FIREFIGHTERS fear dangerous winds could complicate their efforts to tackle blazes in the Blue Mountains and other dry parts of NSW.

Fires are still burning in the mountains and although the threat to homes has eased winds of up to 85km/h are expected to fan the blazes throughout the day.

"The fire in Leura is still burning; it is not threatening property currently but it flared up overnight," said NSW Rural Fire Service deputy commissioner Rob Rogers.

"The fire has calmed down a bit."

Homes were evacuated yesterday as at least six fires flared in the Blue Mountains.

There are other fires in the west and the southwest of the state, Mr Rogers told the Seven Network.

"We have been very much looking at new fires starting today," he added.

"That is a concern to firefighters and police.

"People do not understand that the fire danger is real."