Rising waters in Australia have caused a mass exodus of people and animals - all clamoring to get to high ground.

Deadly spiders and snakes, in particular, are causing concern for some as the creatures are now making their way into people's homes.

Nonstop rainfall since last week has resulted in record-breaking floods hitting Australia's eastern coast. The rains, which have drenched the region since Thursday, have caused major dams to overflow - causing flash floods.

Residents posted several photos and videos on social media, showing how spiders and other animals are entering their homes as they scramble to get to high ground.   In New South Wales, at least 18,000 people have been evacuated from low-lying areas.

"It's still raining here and the floodwater is still rising, the water is getting closer to our home. In the morning it should be inside and the spiders will be all over the house," New South Wales resident Matt Lovenfosse said in a post on Facebook.

Lovenfosse said that most of the trees on his family's farm in Kinchela Creek are now "full of snakes." He said that like people, animals are also seeking refuge from the sudden deluge of water.

"So many SPIDERS from the floodwater, they will climb up your legs to get shelter as well," Melanie Williams from the NSW town of Macksville said in a separate post.

Australian Prime Minister Scott Morrison said Tuesday that the country's floods have become the country's "greatest concern." He said that people should expect "more rains and days of danger."

So far, no deaths have been reported. However, the floods have displaced thousands of people and destroyed billions of dollars in private and public property.

Morrison said that the rains are expected to ease Wednesday but the flood threat will remain. He said that Sydney's largest dam - Warragamba Dam - will continue to flow for at least another week. Officials estimate that the dam had already discharged more than 500 billion liters of water into Sydney- equivalent to the volume of Sydney Harbor.