The WASA drainage system covers only 37 percent area in Dhaka City leaving the most of the metropolis vulnerable to severe waterlogging particularly during the monsoon.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/wasa-drainage-covers-37pc-dhaka-city
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/new-nation-bangladesh
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-resources
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/drainage
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/monsoons
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/sanitation
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/garbage
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/waste-management
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bangladesh
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/dhaka