CANBERRA, Nov. 21 (Xinhua) - Up to 100 fires are burning across New South Wales (NSW) as a large swathe of the state begins a day of total fire bans, local media reports Saturday.

    The NSW Rural Fire Service (RFS) says more extreme heat is on the way, propelling the "difficult and challenging" conditions for firefighters on Saturday.

    The fires were moving slowly late on Friday as crews worked with heavy machinery to establish containment lines.

    No homes are under threat at present, but residents of Bilpin and Mountain Lagoon are advised to activate their bushfire survival plans.

    A number of fires are also alight in remote and rugged terrain within the Blue Mountains.

    Firefighters worked overnight to construct containment lines which will be strengthened with the use of heavy machinery and aircraft on Saturday.

    A community information point will be established at the Mt. Wilson Rural Fire Brigade station, where residents can receive updates and advice on Saturday.

    The extreme conditions forced the closure of the Blue Mountainsational Park, which will remain shut until further notice.

    A total fire ban has been issued for Saturday in the Greater Hunter, Greater Sydney, central ranges, northern slopes, north western, upper central west, lower central west, far western and central ranges regions.

    Record-breaking hot temperatures, storms and wild winds on Friday sparked and fueled a series of bushfires, mostly in remote and inaccessible terrain in the Blue Mountains, the Hawksbury region and the state's northeast.