This year during monsoon, all the North Indian states, except Himachal Pradesh, have already received above-normal rainfall, and the monsoon is still continuing. Due to this heavy downpour, a large area (including urban and agricultural) of Punjab has been flooded. It is a well-known fact that floods are created only when the run-off water does not find any way to drain from the region. Due to lack of proper outlet, run-off water makes its own way according to the general gradient of the terrain and destroys everything which comes in its path.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/floods-punjab-can-role-inhabitants-be-neglected
[2] http://admin.indiaenvironmentportal.org.in/category/author/k-vashisht
[3] http://admin.indiaenvironmentportal.org.in/category/journal/current-science
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/land-encroachments
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/waterlogging
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/drainage
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/natural-disasters
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/floods
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/punjab
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/hoshiarpur-d
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/kapurthala-d
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rainfall-pattern