Using predictions from the National Oceanic and Atmospheric Administration, Coastal Risk Mapping shows many more Austrlian homes, streets and critical infrastructure could be inundated by the year, 2100. 

Scientists are forecasting levels will rise between 0.4 and 1.1m over the remainder of this century, depending on how rapidly the world reduces emissions of greenhouse gases.

The modelling shows a rise of 0.7 metres will put most of Invermay, including UTAS Stadium and the university’s Inveresk campus, underwater.

Launceston businesses on Boland Street, near Glebe Farm Road, are also expected to have soggy floors.

Coastal Risk Mapping website co-creator Nathan Eaton said it was critical for people to appreciate what rising sea levels could mean for their communities.

“Anyone can look at these maps and visualise exactly how sea-level rise, driven by climate change, will permanently alter our coastline and neighbourhoods,” he said.

“We already knew this was going to be bad news for low-lying areas, but the latest science is telling us to brace for even worse.”

University of New South Wales Climate Change Research Centre Professor John Church said a two-metre sea level rise was imminent if climate change was not taken seriously.

“With business as usual emissions, the questions are when, rather than if, we will cross a two-metre sea-level rise,” he said. 

Across the globe, sea levels have risen an average of 17cm over the 20th century.

Airports in Hobart, Brisbane and Sydney, the Port of Melbourne and low-lying cities like Byron Bay, the Gold Coast, Cairns and Darwin will be inundated under the updated scenario of a two-metre sea level rise by 2100.

But Insurance Council of Australia communications general manager Campbell Fuller said the predictions were unlikely to affect premiums “when ascribed to perils many decades in the future”.

“Insurers underwrite premiums based on their assessment of risk over the 12 months of the policy,” he said.

But Mr Fuller said the council continued to urge the federal government to increase federal mitigation spending to $200 million each year.

“As the impact of climate change becomes more acute, higher spending on physical mitigation will be essential to protect lives and property, and reduce the vastly higher sums needed to repeatedly rebuild homes, businesses and infrastructure,” he said.