As they try to cope with the flood crisis, Brisbane's residents may have to get by without their favourite beer.

There are also major disruptions to food supplies in the city, with producers expecting shortages to continue for some time.

Flooding in Milton Credit:David Downie

Retailers have warned some supermarket shelves could remain empty for days, and people may struggle to buy staples, including dairy products and bread.

Representatives for Queensland's iconic XXXX beer have told shoppers to expect ongoing shortages.