They flood refineries don't they?

"Cause: Flood waters inundated the oily water sewer system allowing hydrocarbons to float out to the adjacent storm water concrete ditches.
Action taken: Flood waters being pumped down in a manner to contain any floating hydrocarbon. Vac trucks and sorbents used to remove contaimination.
Emissions estimation method: Best engineering judgement used to estimate quantity," it says here.

Upshot: benzene loosed upon Sweeny & environs.