Hello Sterling,

Thxs for responding. Yep, my initial impression of the headline was the same, but if one peruses Pemex's sad history of oil & gas leaks leading to explosions and/or enviro-devastation, plus all the people currently treading in chemically and sewage-spicey Tabasco sauce--it makes more sense.

Here is just one example with photos:

http://www.semp.us/publications/biot_reader.php?BiotID=356
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The Guadalajara 1992 Sewer Gas Explosion Disaster

The blasts measured 7.1 and 7.0 on the Richter scale at the University of Mexico in Mexico City some hundreds of miles away, according to one report. (16)

About 7 miles of sewer pipe exploded. The worst damage at the street level was at Gante and 20 de Noviembre streets. Varley explains that “Gante Street marked the northern edge of an industrial area and the southern edge of an old, tight-knit, densely populated and relatively poor neighborhood in Guadalajara called Analco, which sat above Guadalajara’s sewer main—a pipe 18 feet in diameter.” (14) When the pipe exploded, several city blocks were reduced to ravines containing 230,000 tons of rubble. The blast hurdled cars and busses in the air, some of which landed on nearby rooftops. Adults, children, and pets suddenly dropped out of site beneath the concrete rubble. Easter vacation explains in part the number of children victims who had been playing on the street.
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Imagine what detrito-terrorists could do in a major American city if they stole a gasoline tanker, then drained it into a major and critical sewer pipe.

Bob Shaw in Phx,Az Are Humans Smarter than Yeast?