Authorities have evacuated a half-mile (805-metre) area around the chemical spill and the waterway was closed as well.
The US Coast Guard is working with the state Department of Environmental Protection to assess the situation.
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Outbreaks of rain are set to sweep across the country, getting heavy and thundery in places.
Owners must also prove they have something to pick up dog mess with under new rules imposed by one council.
The former prime minister made the comments as he prepares to return to politics saying he wants to be "part of the debate" on Brexit.