At about 9.40am, crews responded to the call.

As crews arrived, a Batemans Bay Fire and Rescue spokesman said Bunnings staff had already extinguished the fire using a hose reel.

He believed electrical conduit, packaged in cardboard, had caught fire at the loading dock. He was uncertain to what had caused the fire.

Fire crews remind the public of the statewide total fire ban which is now in force and has been extended until midnight Wednesday, November 13.

NSW RFS said: "That means no fires out in the open anywhere in NSW as very dangerous conditions are forecast for today."

Fire crews warned members of the public to be conscious to dispose of cigarette butts properly and to not use machinery that causes sparks.