As residents flee their homes to drier grounds in isolated Rockhampton Queensland, plagues of snakes and crocodiles are moving into town in search for dry sanctuaries.

Crocodile sightings are sweeping through the town while snakes up to two metres (6.5 feet) long have been reported around the town centre.

State Emergency Service (SES) operations direct Scott Mahaffey said “(Snakes are) in their mating season and they’ve been flushed out of their environment … snakes are very, very cranky right now.”

Some of the snakes reported are highly venomous and include the red bellied blacks, taipans and brown snakes. While crocodiles are harder to identify as they camouflage themselves amongst the debris floating in the flood waters.

Authorities are advising that Rockhampton could also be hit by sandflies and disease-carrying mosquitoes breeding in the standing water. There have also been reports of poisonous cane toads spotted around Rockhampton.

It has been reported there are approximately 200 home already flooded in Rockhampton with the Fitzroy River that runs through the town is expected, at this stage, to peak on Wednesday or Thursday at 9.4 metres.

Tonight, the southern Queensland town of St George is on heightened flood alert as the worst of the floods is yet to hit the town. All efforts have been put into evacuating residents from their homes, hospital and nursing homes, strengthening levees and sandbagging properties in an attempt to keep out flood waters from the Balonne River. The Balonne River is expected to peak late Sunday or Monday at an anticipated 14 metres.