Westpac Banking Corp. (ASX: WBC) has set up a mobile banking centre at Brisbane's primary flood evacuation precinct to allow displaced victims of the devastating Queensland floods to perform basic banking transactions and cash emergency relief cheques.

The bank said on Thursday it has also now reopened for business a number of Westpac branches in flood-affected areas.

The mobile banking centre will be available for anyone to cash government emergency relief cheques - not just customers of Westpac. It will be set up at the RNA Showgrounds located at Gregory Terrace, Bowen Hills from midday today.

The temporary branch will be manned by Westpac staff and allow evacuees and others to withdraw cash from their accounts as well as cash emergency relief cheques which have been issued by the Queensland Government.

Staff will also be able to field enquiries from Westpac customers about their mortgages, credit-card limits and payments, and generally help as much as possible.

"Westpac is there to do whatever it can to support Queensland in its time of need," Westpac Queensland State General Manager Retail, Andy Fell, said.

"Our Westpac staff will be on the ground at the evacuation centre to help victims of the flood get access to their money, cash emergency-relief cheques or just assist in any way that they can," Mr Fells said.