sentences:  Particularly, heavily settled and intensified used low-level coastal plains, deltas, and islands are particularly susceptible to coastal erosion and land loss, sea flooding and barrage, especially vulnerable to coastal erosion and land loss, inundation and sea flooding, upstream movement of the saline/freshwater front and seawater incursion into freshwater lenses.Mainly at risk are large delta regions of Bangladesh, Myanmar, Vietnam and Thailand, and the low-lying areas of Indonesia, Malaysia and the Philippines.Socio-economic effects may be noticeable to major cities and ports, tourist resorts, artisanal and commercial fishing and coastal agriculture, and infra-structure development.