Sinkholes

Every website I searched for sinkholes in El Salvador, the feed was all about Guatemala. I found this article which is somewhat connected to El Salvador. Sinkholes are natural depressions that can form when water-saturated soil and other particles become too heavy and cause rooks of existing voids in the soil to collapse. A storm sewer may have been slowly saturating the surrounding soil for a long time before tropical storm Agatha added to the inundation. Honduras and El Salvador were other countries affected by this storm taking the death toll to over 175.

This is the sinkhole in Guatemala caused by the storm that also affected El Salvador. 

http://prasoondiwakar.com/wordpress/news/hole-in-the-earth-guatemala-sinkhole