A report by the Climate Commission has predicted up to 28,900 coastal homes in Perth and the southwest will be flooded by the end of the century due to rising sea levels.
The Climate Commission will release a report on Tuesday titled The Critical Decade: Western Australian Climate Change Impacts.
The report forecasts sea levels on WA's coast will continue to rise at double the global average, impacting significantly on WA's coastal infrastructure and eroding the state's iconic beaches.
Habitats for iconic species such as the quokka, Carnaby's cockatoo and the tingle tree are also likely to be reduced due to climate changes, the report says.
The world famous Ningaloo Reef and other coral reefs are also in danger, which will greatly affect the multi-million dollar tourism industry it supports, according to the report.
WA's declining rainfall and higher temperatures are also expected to have serious implications on agriculture and urban water supplies in the southwest, the report reveals.
Climate Commissioner and author of the report, Professor Will Steffen, says WA's economy, coastal infrastructure, biodiversity, mining infrastructure, agriculture and tourism industries are all vulnerable to the impacts of a changing climate.
"We are more certain of the climate change risks for water resources for southwestern WA than any other part of Australia," he said.
"Over the last 40 years we've watched the southwest of the state become markedly drier with significant impacts for agriculture and urban water supplies."
Professor Steffen said the risks had never been clearer, which meant action had never been more immediately necessary.
"This is the critical decade. The decisions we make this decade will determine the severity of climate change impacts our children and grandchildren suffer," he said.
Professor Steffen said WA had potential to expand renewable energy generation with some of the best wind and solar in Australia.
