Seven tankers, 30 Rural Fire Service personnel and Cadia Valley Operations (CVO) staff are fighting a 22-hectare timber fire started by dry lightening on CVO land at 11am Sunday morning.

At Nashdale, a six-hectare scrub fire is now under control after RFS crews from Canobolas, Nashdale, Lidster and Borenore spent all of Saturday night fighting the blaze from 12:30am.

The fire was caused by three lightning strikes within 300 metres, Canobolas RFS duty officer Steve Smith said.

The 12-hectare Ophir Road fire remains under control.

Update - 6.45pm

WHILE the Ophir fire near Clifton Grove is being contained other firefighters are rushing across the Canobolas Zone with 12 new fires started within the last two hours.

Police suspect the fire at Ophir was deliberately lit, while the dozen new fires started due to a dry lightning storm that passed through the area on Saturday afternoon.

"There is a large front coming through with a lot of lightning," NSW Rural Fire Service spokesperson Geoff Selwood said.

Update - 2.58pm

THREE aerial water bombers are now on site at the Ophir fire near Fourth Crossing north of Orange.

The out of control fire remains around two hectares in size and is burning in a south-westerly direction.

Update - 2.20pm

ROAD blocks are now in place around the Fourth Crossing area on Ophir Road with a two hectare out of control fire now burning.

NSW Rural Fire Service have a 'watch and act' alert in place with a heightened level of threat and conditions are changing.

Saturday January 18 - 2.07pm

FIREFIGHTERS are rushing to an out of control fire near Fourth Crossing on the Ophir Road north of Orange.

A NSW Rural Fire Service (RFS) spokesperson said they are unsure at this stage if the fire is burning through grass or forested areas.

Eight RFS tankers and two water bombers are are on their way to the scene.

More information as it comes to hand.