Story highlights Environmentalists point to a suspended chemical safety rule

Plants have sustained damage from Hurricane Harvey

(CNN) What began as a story about flooding, environmentalist groups say, has become about preventable environmental disaster.

Coastal Houston is the site of a large concentration of chemical plants, refineries, superfund sites and fossil fuel operations. Some have suffered damage from Hurricane Harvey, releasing toxic compounds into the environment, and environmentalists, in turn, are pointing the finger at politicians and industry leaders who have sought to ax regulations.

Specifically, they're criticizing the Environmental Protection Agency for delaying a chemical plant safety rule once President Donald Trump took office. In part, the rule would have ensured first responders knew what chemicals they may come in contact with and how to handle those chemicals in an emergency response situation.

The intention was to help prevent and mitigate chemical accidents.

"The rules that were delayed were designed to reduce the risk of chemical releases," said Peter Zalzal, special projects director and lead attorney at Environmental Defense Fund. "This kind of situation underscores why we shouldn't be rolling these rules back."

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