Large parts of the Dyfi estuary could be set to disappear under rising sea levels, according to a new report published this week.

Research from campaign body Climate Central shows how large parts of the Welsh coast could disappear into the sea by 2050, unless global temperature rises are kept below 2c.

The group has produced maps to illustrate the impact rising sea levels could have on coastal areas, showing large parts of west Wales which are threatened by the impact of climate change.

The at risk areas show the seaside resorts of Barmouth and Tywyn as being below predicted sea-levels, while the exposed Ynsyslas peninsula is also predicted to vanish.

Large swathes of the Dyfi flood plain would be at risk, with water levels set to rise further towards Machynlleth and Pennal.

The research coincides with a fresh report this week by the UN's Intergovernmental Panel on Climate Change (IPCC), a group of scientists whose findings are endorsed by the world's governments, which spelt out the dangers of a failure to tackle climate change.

The authors say that since 1970, global surface temperatures have risen faster than in any other 50-year period over the past 2,000 years.

"In the paper it shows that even with 1.5C warming we're looking at the long-term of two to three metres. And under the highest scenarios, we could be looking at multi-metre sea-level rise by 2150," said Prof Malte Meinshausen from the University of Melbourne and an IPCC author.

"That is just scary, because it's maybe not at the end of our lifetime, but it is around the corner and it will be committing this planet to a big legacy."

Pwllheli, Porthmadog and the Llŷn Peninsula could also be underwater, while Fairbourne, in Gwynedd, which is separated from Barmouth by the mouth of Afon Mawddach, is also shown as at risk.

Montgomeryshire Extinction Rebellion activist David France said community action was required to force policy changes on global warming issues.

"Towns and villages destroyed by flooding is what we’re going to get now, at around 1 degree of warming. Widespread crop failures and social collapse become more of a risk with every extra point-one-degree of warming," he said.

"Climate science is clear that we need complete system change, now.

"And if we are to have a fair and just transition to sustainability, those changes need to be by the people, for the people.

"We need communities to come together to create a better future, because no one is going to make it for us."