1.   His parents, Pat and Larry, own Treasure Coast Contracting, a Vero Beach company that builds underground sewers and waterlines.

2.   The others take water that has not been used back into the underground sewer system.

3.   Authorities blocked underground sewers, fearing that flood water would rush into areas in Gorakhpur city that were still dry.

4.   In connected sewage systems, sewage outlets are connected to a sewage treatment plant via a network of underground sewer pipes.

5.   Indeed, excavations originally begun during work on underground sewer and utility lines exposed ancient underpinnings still partially covered with marble.

6.   Police officers said the explosions were probably caused by methane gas in the underground sewer lines or adjoining electric cables.

7.   Police chief Kumar said they were apparently caused by methane gas in the underground sewer lines or adjoining electric cables.