Firefighters are continuing to monitor a grass fire that has threatened homes on Queensland’s Darling Downs.

The fire took hold on Thursday, south of the town of Millmerran.

At one stage it threatened homes in the Wattle Ridge area, but crews were able to contain it.

Fire and emergency services Superintendent Lindsay Hackett says two water-bombing aircraft are on stand-by if the fire flares up again.

“Through the night we’ve had crews doing containment of that fire,” he told the ABC.

He said Friday’s weather conditions would determine if the fire remained under control, with wind gusts of up to 30km/h.