After taking evidence from more than 300 witnesses, the Queensland floods inquiry held its final hearing in Brisbane on Friday.
More than 78% of the state was declared a disaster zone last summer.
The inquiry has been investigating the lead-up to the crisis and how it can be prevented from happening again.
Since delivering an interim report in August, the inquiry has held a second round of hearings.
The ABC reports more than 700 submissions were made during 57 days of hearings.
On Thursday, the inquiry heard how Queensland's mining industry was brought to its knees during the disaster, which is estimated to have cost the industry $A7 billion in lost production.
The inquiry now has three months to prepare its final report, which is due in February.