One of the lead authors, Murdoch University climate scientist Jatin Kala, said even if global warming was kept to 1.5C there could still be "dire consequences" for WA's South West, such as altered growing seasons in the Wheatbelt and wine regions such as the Swan Valley.
The IPCC warns, however, there is a stark difference between 1.5 and even 2 degrees Celsius of warming.
He warned the world was already seeing the beginning of "massive displacement and a shocking rise in hunger" - and unless temperatures stayed below 1.5C, island nations would disappear beneath rising seas.
"The policy implications of the report are obvious: We need to implement a suite of policies to sharply limit carbon emissions and build climate resilience, and we must do all this is in a way that prioritizes equitable outcomes particularly for the world's poor and marginalized communities", Cleetus added.
"E$3 ven with erroneous attribution of extreme weather/climate events and projections using climate models that are running too hot and not fit for goal of projecting 21st century climate change, the IPCC still has not made a strong case for this massive investment to prevent 1.5C warming", she said on her Climate Etc. blog.
Professor Jim Skea, from Imperial College London and one of the report researchers, said: "The changes that would be needed to keep global warming to 1.5C are really unprecedented in terms of their scale".
For people, it would greatly reduce the risk of water shortages, food scarcity, and poverty related to climate change.
Experts across the globe have put their collective heads together to deliver a landmark report on the potentially devastating impact of climate change - and their conclusions are not good news. Coral reefs would decline by 70-90 percent with global warming of 1.5 °C, whereas virtually all ( 99 percent) would be lost with 2 °C.
If greenhouse gas emissions are not cut drastically and rapidly, between 2030-52, Earth's global average temperatures could rise by 1.5 degree above pre-industrial era levels, leading to widespread climate change impacts.
Overall, the authors say that current greenhouse gas emissions must be reduced by 45 percent from 2010 levels by 2030.
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Enlarge / Benefits and trade-offs of limiting global warming to 1.5 °C for different categories of development goals.
Last-ditch efforts to hold climate change to the most ambitious target set by governments will likely require using every available technique rather than picking and choosing the most attractive ones, climate scientists said on Monday.
"The next few years are probably the most important in our history", said Debra Roberts, co-chair of IPCC Working Group II, in a statement. The atmosphere is nearly 1 degree Celsius (1.8 Fahrenheit) hotter than it was at the start of the industrial revolution, and burning more fossil fuels will accelerate the shift toward higher temperatures, the group said in its report.
The Paris Agreement, adopted by almost 200 nations in December 2015, included the aim of strengthening the global response to the threat of climate change by limiting global temperature rise no more than 2 C.
"The numbers in the IPCC report are 0-2 per cent of electricity generation comes from coal".
This target was long considered the threshold for the most risky effects of climate change, including the mass destruction of coral reefs, widespread food shortages, destructive wildfires and coastal flooding. That may not sound like much in comparison to oft-discussed worst-case scenarios of more than a meter of sea level rise, but 10 million people live in areas that would be affected by those extra 10 centimeters.
Limiting global warming would also give people and ecosystems more room to adapt and remain below relevant risk thresholds, added Pörtner.
Two of the most intense typhoons on record have hit the city in the last two years - Hato last year and Mangkhut last month.
The government has been urged to strengthen United Kingdom climate targets and action, to reduce the severity of climate impacts, ranging from extreme weather to rising seas. When the next climate talks happen this December, the new report is created to give governments the incentive to go much further, faster.