Tamil Nadu has a coastline that is 1,076 km long, and most of the vital installations and infrastructure, are located along the coast, not to mention the mangroves.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/effects-sea-level-rise-tamil-nadu-coast
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/tamil-nadu
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/global-warming
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/storms
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/nagapattinam-d
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/thiruvarur-d
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/thanjavur-d
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pudukkottai-d
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ramanathapuram-d