UPDATE 8.30PM. All northbound lanes reopened on the M1 Motorway, near Wyee, and there are currently delays of about 25 minutes for motorists travelling from Gosford to Newcastle
UPDATE 6PM: Back burning operations are continuing along M1 near Wyee with traffic delays in the area. Drivers are facing queues 4 kilometres long northbound, with delays of 40 minutes. Lane 1 closed, with firetrucks in lane. Reduced visibility due to smoke. Live M1 traffic links here
Mannering Park Road fire is now under control, as is the grassfire at Browns Road, Blackhill.
UPDATE: One lane of the M1 has reopened at Wyee, but smoke is heavy and drivers are urged to slow down and take care.
UPDATE: All northbound lanes of the M1 (formerly F3) at Wyee are closed as firefighters carry out a backburn, and a spotfire has broken out on the median strip.
FIREFIGHTERS are set to close one northbound lane of the M1 (formerly F3) at Wyee to carry out a backburn operation to try to halt a fire in bush nearby.
One northbound lane will be closed to traffic as firefighters use the breakdown lane to backburn.
Traffic has been slowed as a precaution and because of reduced visibility.
Another fire is burning at Mannering Park, to the rear of Mannering Colliery, but has been contained.
A third fire at Yarramalong is heading south-west to isolated properties and fire crews are attempting to backburn along Yarramalong Road.
Small fires have also been reported on the New England Highway at Liddell and Branxton, in Brown's Road, Black Hill, at Cessnock, Medowie and Carrington/North Arm Cove.
FIRE crews in the Hunter are closely monitoring developments in Sydney as well as local conditions, with a bush and grass fires popping up in the region.
Two fires near Cessnock, one at Wollombi and one at a property past Blaxlands Arm Road, in Laguna, have moved from a ‘‘watch and act’’ alert to an ‘‘advice’’ alert.
No properties are believed to be under threat and Rural Fire Service crews are on scene and controlling the blazes.
Firefighters are also working to bring two scrub fires on the Central Coast, at Mannering Park and Wyong, under control.
A house in Sydney’s Blue Mountains has been lost as firefighters battle 40 uncontained blazes which have caused mass evacuations.
NSW Premier Barry O’Farrell said a house had been lost on Hawkesbury Road in Winmalee and there were unconfirmed reports two firefighters injured battling the blaze there.
‘‘(There is) one confirmed report of a house lost in Hawkesbury Road, unconfirmed reports of two injured firefighters at the same location,’’ he told parliament on Tuesday.
‘‘This is an ongoing situation.’’
The RFS later confirmed five firefighters suffered smoke inhalation and two received minor burns fighting the Winmalee blaze.