Gretel Killeen has lashed out at Prime Minister Scott Morrison's leadership qualities, calling for his resignation.

The PM has been the target of criticism in recent days and weeks for his role in the ongoing bushfire crisis.

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In a heated exchange with broadcaster Chris Smith on Seven's Sunrise on Saturday morning, Killeen slammed Morrison as "irresponsible".

"Scott Morrison's unwillingness to accept responsibility for climate change is so irresponsible," she said.

Scott Morrison tours the Wildflower farm owned by Paul and Melissa Churchman in Sarsfield. Credit: JAMES ROSS / AAPIMAGE

Smith rebutted by asking whether "stopping the coal industry tomorrow" would immediately reduce the "temperature of the planet".

Killeen lashed out and accused him of being a "reductionist" and omitting the larger issue.

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"A leader requires very special qualities," Killeen said.

"And when we look at a man like Scott Morrison you have to ask yourself why, with this barrage of advice, with this barrage of criticism and a barrage of inspiration and opportunity, is he doing nothing?"

Scott Morrison poses with firefighters in South Australia. Credit: KELLY BARNES / AAPIMAGE

She also called for him to step down.

"I don't think this man is a leader and I think he should resign."

Chevron Right Icon 'I don't think this man is a leader and I think he should resign.'

The prime minister was heckled in the streets of Cobargo on Thursday, the town where father and son Robert and Patrick Salway died in a bushfire earlier this week.

One resident yelled that Morrison was an "idiot" who wouldn't be winning any votes around there.

NSW has declared a state of emergency and Victoria has declared a state of disaster.

In the video below: The latest on the NSW bushfires

Play Video NSW is ready for dangerous winds and heat to send deadly fires towards dozens of towns on Saturday, authorities say. NSW is ready for dangerous winds and heat to send deadly fires towards dozens of towns on Saturday, authorities say.

Morrison said he understands the criticism being directed his way because people are "hurting".

"I don't take it personally, I just see it as a sense of frustration and hurt and loss and anger at what is the ferocity of these natural disasters," Morrison told reporters in Bairnsdale on Friday.

- with AAP

Many have been asking how you can help the people and animals affected by the bushfire crisis. We’ve launched the ‘HELP HERE’ page to make that easier for you.