A climate change study has revealed that multiple areas of Pembrokeshire could be underwater by the end of the decade.
The study has been conducted by Climate Central, an independent organisation of leading scientists and journalists who research climate change and its impact on the public.
The organisation used current projections to produce a map showing which areas of the country would be underwater by 2030.
The map shows that all the coastal areas around Pembrokeshire will lose at least some land to the rising sea levels.
The biggest move inland comes around Tenby, with water coming in as far as St Florence and Gumfreston.
While parts of Cleddau Woodlands will also be lost.
Haverfordwest will also be impacted by rising sea levels, with flooding from the Western Cleddau impacting water levels in the town itself.
Climate Central admits the calculations that have led to fears of a nightmare scenario include "some error".
It says: "These maps incorporate big datasets, which always include some error. These maps should be regarded as screening tools to identify places that may require deeper investigation of risk."
The maps have been based on "global-scale datasets for elevation, tides and coastal flood likelihoods" and "imperfect data is used".
Somewhat comfortingly, Climate Central adds: "Our approach makes it easy to map any scenario quickly and reflects threats from permanent future sea-level rise well.
"However, the accuracy of these maps drops when assessing risks from extreme flood events.
"Our maps are not based on physical storm and flood simulations and do not take into account factors such as erosion, future changes in the frequency or intensity of storms, inland flooding, or contributions from rainfall or rivers."
But it adds: "Improved elevation data indicate far greater global threats from sea level rise and coastal flooding than previously thought, and thus greater benefits from reducing their causes."
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here