One family has been evacuated as floodwaters rise in Mount Isa and surrounds in Queensland's north-west.

A monsoonal low continues to dump heavy rain in the Gregory, Leichhardt and Cloncurry river catchments, flooding parts of the Barkly Highway and isolating towns from Mount Isa to the Avon Downs in the NT.

People are being advised not to travel further west than Richmond and NT residents are being told not to travel east to the Queensland border.

North-west emergency services spokesman Elliott Dunn said a husband and a wife with two children were evacuated from their property north-east of Cloncurry on Sunday.

"They were evacuated for convenience because they were going to be isolated for some time," Mr Dunn told AAP.

"At this stage, it's not posing a threat to any houses."

He said there had also been landslides along the Barkly Highway with huge rocks blocking passage.

"Some very low lying bridges are flooded - in some places three or four metres over the bridge but that is not unusual.

"It really has only just come up and we are expecting it to rise further in the next 24 hours if we keep seeing rain."

The weather bureau is predicting more rain.

So far, the heaviest fall has been 175mm in Herbert Vale.