Robin Cook: Fever

As the nights became shorter and hot summer approached, a single drop of benzene appeared at the juncture of an off-load pipe in one of the new chemical holding tanks. No one supervising the installations had fully understood the insidious propensities of benzene, and from the moment the first molecules had flowed into the new system, they began dissolving the rubber gaskets used to seal the line.

It had taken about two months for the toxic fluid to eat through the rubber and drip onto the granite blocks beneath the chemical storage tanks, but after the first, the drops came in an increasing tempo. The poisonous molecules followed the path of least resistance, working their way down into the mortarless masonry, then seeping laterally until they entered the river. The only evidence of their presence was a slightly aromatic, almost sweet smell.

The first to die were the frogs, then the fish. When the river fell, as the summer sun grew stronger, the concentration of the poison soared.